ParseObject.availableKeys - java.lang.StackOverflowError (Only Android 4x)

[RodrigoSMarques]

I'm logging the error log below in Crashlytics only on Android 4 devices (All versions)

I'm using Parse-SDK-Android:parse:1.18.4

---

Fatal Exception: java.lang.StackOverflowError
at java.util.HashSet.iterator(HashSet.java:161)
at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416)
at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416)
........
at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386)
at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386)
at com.parse.ParseObject$State$Init.availableKeys(ParseObject.java:4135)
at com.parse.ParseObject$State$Init.apply(ParseObject.java:4169)
at com.parse.ParseUser$State$Builder.apply(ParseUser.java:1492)
at com.parse.ParseUser$State$Builder.apply(ParseUser.java:1465)
at com.parse.ParseObject$25.then(ParseObject.java:2139)
at com.parse.ParseObject$25.then(ParseObject.java:2127)

---

full_log.txt

---

[freespirit]

We face a similar problem - ParseObject's State stucks in infinite loop (endless recursion). It could be generic to ParseObject.

• Parse SDK v 1.18.4. It may be worth noting the issue didn't occur before updating to 1.18.4 from 1.17.x
• Android 4.4 (only)

Unfortunately I can't provide more detailed steps to reproduce (or unit test) as I am having problems reproducing it myself.

[modislaszlox2]

I'm having the same issue but in my case it happens for multiple OS versions(not only 4). Issue started happening when updated to recent versions.

[RodrigoSMarques]

I'm having this error since previous versions (1.16.7).
I updated a few days ago to version 1.18.5 and the number of errors reduced.
I'm still evaluating.

[AlejandroHCruz]

This happens for us on all the versions of Android.
Also after we updated from 1.17.3 to 1.18.5

Fatal Exception: java.lang.StackOverflowError: stack size 1037KB
at java.util.Collections$SynchronizedCollection.iterator(Collections.java:2075)
...
at java.util.AbstractCollection.addAll(AbstractCollection.java:343)
at java.util.Collections$SynchronizedCollection.addAll(Collections.java:2089)
...
at com.parse.ParseObject$State$Init.availableKeys(ParseObject.java:4135)
at com.parse.ParseObject$State$Init.apply(ParseObject.java:4169)
at com.parse.ParseObject$25.then(ParseObject.java:2139)
at com.parse.ParseObject$25.then(ParseObject.java:2127)
at bolts.Task$14.run(Task.java:872)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeImmediately(Task.java:863)
at bolts.Task.access$000(Task.java:32)
at bolts.Task$10.then(Task.java:654)
at bolts.Task$10.then(Task.java:651)
at bolts.Task.runContinuations(Task.java:956)
at bolts.Task.trySetResult(Task.java:994)
at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39)
at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62)
at bolts.Task$15$1.then(Task.java:934)
at bolts.Task$15$1.then(Task.java:921)
at bolts.Task$14.run(Task.java:872)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeImmediately(Task.java:863)
at bolts.Task.access$000(Task.java:32)
at bolts.Task$10.then(Task.java:654)
at bolts.Task$10.then(Task.java:651)
at bolts.Task.runContinuations(Task.java:956)
at bolts.Task.trySetResult(Task.java:994)
at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39)
at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62)
at bolts.Task$15$1.then(Task.java:934)
at bolts.Task$15$1.then(Task.java:921)
at bolts.Task$14.run(Task.java:872)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeImmediately(Task.java:863)
at bolts.Task.access$000(Task.java:32)
at bolts.Task$10.then(Task.java:654)
at bolts.Task$10.then(Task.java:651)
at bolts.Task.runContinuations(Task.java:956)
at bolts.Task.trySetResult(Task.java:994)
at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39)
at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62)
at bolts.Task$15$1.then(Task.java:934)
at bolts.Task$15$1.then(Task.java:921)
at bolts.Task$14.run(Task.java:872)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeImmediately(Task.java:863)
at bolts.Task.continueWith(Task.java:661)
at bolts.Task.continueWith(Task.java:672)
at bolts.Task$15.run(Task.java:921)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeAfterTask(Task.java:908)
at bolts.Task.access$100(Task.java:32)
at bolts.Task$11.then(Task.java:708)
at bolts.Task$11.then(Task.java:705)
at bolts.Task.runContinuations(Task.java:956)
at bolts.Task.trySetResult(Task.java:994)
at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39)
at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62)
at bolts.Task$15$1.then(Task.java:934)
at bolts.Task$15$1.then(Task.java:921)
at bolts.Task$14.run(Task.java:872)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeImmediately(Task.java:863)
at bolts.Task.continueWith(Task.java:661)
at bolts.Task.continueWith(Task.java:672)
at bolts.Task$15.run(Task.java:921)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeAfterTask(Task.java:908)
at bolts.Task.access$100(Task.java:32)
at bolts.Task$11.then(Task.java:708)
at bolts.Task$11.then(Task.java:705)
at bolts.Task.runContinuations(Task.java:956)
at bolts.Task.trySetResult(Task.java:994)
at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39)
at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62)
at bolts.Task$15$1.then(Task.java:934)
at bolts.Task$15$1.then(Task.java:921)
at bolts.Task$14.run(Task.java:872)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeImmediately(Task.java:863)
at bolts.Task.continueWith(Task.java:661)
at bolts.Task.continueWith(Task.java:672)
at bolts.Task$15.run(Task.java:921)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeAfterTask(Task.java:908)
at bolts.Task.access$100(Task.java:32)
at bolts.Task$11.then(Task.java:708)
at bolts.Task$11.then(Task.java:705)
at bolts.Task.runContinuations(Task.java:956)
at bolts.Task.trySetResult(Task.java:994)
at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39)
at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62)
at bolts.Task$15$1.then(Task.java:934)
at bolts.Task$15$1.then(Task.java:921)
at bolts.Task$14.run(Task.java:872)
at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
at bolts.Task.completeImmediately(Task.java:863)
at bolts.Task.continueWith(Task.java:661)
at bolts.Task.continueWith(Task.java:672)
at bolts.Task$15.run(Task.java:921)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
at java.lang.Thread.run(Thread.java:784)

[hishambakr]

I have same issue with 1.18.5

Fatal Exception: java.lang.StackOverflowError at java.util.HashSet.iterator(HashSet.java:161) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416) at java.util.AbstractCollection.addAll(AbstractCollection.java:74) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386) at com.parse.ParseObject$State$Init.availableKeys(ParseObject.java:4135) at com.parse.ParseObject$State$Init.apply(ParseObject.java:4169) at com.parse.ParseObject$25.then(ParseObject.java:2139) at com.parse.ParseObject$25.then(ParseObject.java:2127) at bolts.Task$14.run(Task.java:872) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeImmediately(Task.java:863) at bolts.Task.continueWith(Task.java:661) at bolts.Task.continueWith(Task.java:672) at com.parse.ParseObject.handleSaveResultAsync(ParseObject.java:2127) at com.parse.ParseInstallation.handleSaveResultAsync(ParseInstallation.java:171) at com.parse.ParseObject$31.then(ParseObject.java:2287) at com.parse.ParseObject$31.then(ParseObject.java:2283) at bolts.Task$15.run(Task.java:917) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeAfterTask(Task.java:908) at bolts.Task.access$100(Task.java:32) at bolts.Task$11.then(Task.java:708) at bolts.Task$11.then(Task.java:705) at bolts.Task.runContinuations(Task.java:956) at bolts.Task.trySetResult(Task.java:994) at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39) at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62) at bolts.Task$15$1.then(Task.java:934) at bolts.Task$15$1.then(Task.java:921) at bolts.Task$14.run(Task.java:872) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeImmediately(Task.java:863) at bolts.Task.access$000(Task.java:32) at bolts.Task$10.then(Task.java:654) at bolts.Task$10.then(Task.java:651) at bolts.Task.runContinuations(Task.java:956) at bolts.Task.trySetResult(Task.java:994) at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39) at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62) at bolts.Task$15$1.then(Task.java:934) at bolts.Task$15$1.then(Task.java:921) at bolts.Task$14.run(Task.java:872) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeImmediately(Task.java:863) at bolts.Task.access$000(Task.java:32) at bolts.Task$10.then(Task.java:654) at bolts.Task$10.then(Task.java:651) at bolts.Task.runContinuations(Task.java:956) at bolts.Task.trySetResult(Task.java:994) at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39) at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62) at bolts.Task$15$1.then(Task.java:934) at bolts.Task$15$1.then(Task.java:921) at bolts.Task$14.run(Task.java:872) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeImmediately(Task.java:863) at bolts.Task.continueWith(Task.java:661) at bolts.Task.continueWith(Task.java:672) at bolts.Task$15.run(Task.java:921) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeAfterTask(Task.java:908) at bolts.Task.access$100(Task.java:32) at bolts.Task$11.then(Task.java:708) at bolts.Task$11.then(Task.java:705) at bolts.Task.runContinuations(Task.java:956) at bolts.Task.trySetResult(Task.java:994) at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39) at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62) at bolts.Task$15$1.then(Task.java:934) at bolts.Task$15$1.then(Task.java:921) at bolts.Task$14.run(Task.java:872) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeImmediately(Task.java:863) at bolts.Task.continueWith(Task.java:661) at bolts.Task.continueWith(Task.java:672) at bolts.Task$15.run(Task.java:921) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeAfterTask(Task.java:908) at bolts.Task.access$100(Task.java:32) at bolts.Task$11.then(Task.java:708) at bolts.Task$11.then(Task.java:705) at bolts.Task.runContinuations(Task.java:956) at bolts.Task.trySetResult(Task.java:994) at bolts.TaskCompletionSource.trySetResult(TaskCompletionSource.java:39) at bolts.TaskCompletionSource.setResult(TaskCompletionSource.java:62) at bolts.Task$15$1.then(Task.java:934) at bolts.Task$15$1.then(Task.java:921) at bolts.Task$14.run(Task.java:872) at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105) at bolts.Task.completeImmediately(Task.java:863) at bolts.Task.continueWith(Task.java:661) at bolts.Task.continueWith(Task.java:672) at bolts.Task$15.run(Task.java:921) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) at java.lang.Thread.run(Thread.java:841)

[dybarsky]

Same here:

java.lang.StackOverflowError
	at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416)
        .......
	at java.util.Collections$SynchronizedCollection.iterator(Collections.java:416)
	at java.util.AbstractCollection.addAll(AbstractCollection.java:74)
	at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386)
        ........
	at java.util.Collections$SynchronizedCollection.addAll(Collections.java:386)
	at com.parse.ParseObject$State$Init.availableKeys(ParseObject.java:4135)
	at com.parse.ParseObject$State$Init.apply(ParseObject.java:4169)
	at com.parse.ParseUser$State$Builder.apply(ParseUser.java:1492)
	at com.parse.ParseUser$State$Builder.apply(ParseUser.java:1465)
	at com.parse.ParseObject$25.then(ParseObject.java:2139)
	at com.parse.ParseObject$25.then(ParseObject.java:2127)
	at bolts.Task$14.run(Task.java:872)
	at bolts.BoltsExecutors$ImmediateExecutor.execute(BoltsExecutors.java:105)
	at bolts.Task.completeImmediately(Task.java:863)
	at bolts.Task.continueWith(Task.java:661)
	at bolts.Task.continueWith(Task.java:672)
	at com.parse.ParseObject.handleSaveResultAsync(ParseObject.java:2127)
	at com.parse.ParseUser.handleSaveResultAsync(ParseUser.java:674)
	at com.parse.ParseObject$31.then(ParseObject.java:2287)
	at com.parse.ParseObject$31.then(ParseObject.java:2283)
	at bolts.Task$15.run(Task.java:917)
         .......

[jhansche]

Does anyone have a sample JSON payload that is known to trigger this? Would be great to have a unit test case for it.

[AlejandroHCruz]

Sadly now, only have the stacktrace on Fabric

[nbeerbower]

Also seeing this issue on Android 7 with Parse 1.18.5

java.util.HashMap$KeyIterator. (HashMap.java:883)
java.util.HashMap$KeyIterator. (HashMap.java)
java.util.HashMap.newKeyIterator (HashMap.java:1154)
java.util.HashMap$KeySet.iterator (HashMap.java:1188)
java.util.HashSet.iterator (HashSet.java:170)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.Collections$SynchronizedCollection.iterator (Collections.java:1876)
java.util.AbstractCollection.addAll (AbstractCollection.java:341)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
java.util.Collections$SynchronizedCollection.addAll (Collections.java:1890)
com.parse.ParseObject$State$Init.availableKeys (ParseObject.java:4135)

Looks like this is related to #795 ?

[jhansche]

Looks like this is caused by the enabling the LDS.

Every time an existing object is mergeFromServer(), the availableKeys become wrapped in a new SynchronizedSet, and so every call to one of the collection methods has to traverse the entire depth of nested/wrapped sets. A simple unit test to repro the issue:

  @Test
  public void testFromJsonWithLdsStackOverflow() throws JSONException {
    ParseObject localObj = ParseObject.createWithoutData("GameScore", "TT1ZskATqS");
    OfflineStore lds = mock(OfflineStore.class);
    Parse.setLocalDatastore(lds);

    when(lds.getObject(eq("GameScore"), eq("TT1ZskATqS")))
            .thenReturn(localObj);

    JSONObject json = new JSONObject(
        "{" +
        "\"className\":\"GameScore\"," +
        "\"createdAt\":\"2015-06-22T21:23:41.733Z\"," +
        "\"objectId\":\"TT1ZskATqS\"," +
        "\"updatedAt\":\"2015-06-22T22:06:18.104Z\"" +
        "}");
    ParseObject obj;
    for (int i = 0; i < 6000; i++) {
      obj = ParseObject.fromJSON(json, "GameScore", ParseDecoder.get(), Collections.<String>emptySet());
      assertEquals("TT1ZskATqS", obj.getObjectId());
    }
  }

Note that the actual number in the for loop might need to be tweaked to show the overflow, depending on the JVM the test is running on. For me, that number is somewhere between 6000 - 10,000.

This might look like an unreasonable test, but in reality all it takes is a very active LiveQuery. Basically any time a single object is recreated or updated from JSON, the old object state is obtained from the OfflineStore, and then refreshed/updated from the new JSON. Doing that causes the availableKeys set to become wrapped over and over in nested SynchronizedSet instances.

This simple change fixes it, confirmed by increasing the for loop count above, and it still passes well beyond 1,000,000:

availableKeys = Collections.synchronizedSet(new HashSet<>(state.availableKeys()));

The solution was suggested by @vovkab in #795. I will make a new PR to address.