exponential backoff with tenacity (#513)

* exponential backoff with tenacity

* fixes lints

Co-authored-by: Marco Castelluccio <[email protected]>

Author: anubhabsen

bot/code_coverage_bot/taskcluster.py

@@ -72,7 +72,9 @@ def download_artifact(artifact_path, task_id, artifact_name):
     logger.debug("Downloading artifact", url=url)
 
     @tenacity.retry(
-        reraise=True, wait=tenacity.wait_fixed(30), stop=tenacity.stop_after_attempt(5)
+        reraise=True,
+        wait=tenacity.wait_exponential(multiplier=1, min=16, max=64),
+        stop=tenacity.stop_after_attempt(5),
     )
     def perform_download():
         r = requests.get(url, stream=True)

bot/code_coverage_bot/uploader.py

@@ -63,7 +63,9 @@ def gcp_covdir_exists(repository, revision, platform, suite):
 
 
 @tenacity.retry(
-    stop=tenacity.stop_after_attempt(10), wait=tenacity.wait_fixed(60), reraise=True
+    stop=tenacity.stop_after_attempt(10),
+    wait=tenacity.wait_exponential(multiplier=1, min=16, max=64),
+    reraise=True,
 )
 def gcp_ingest(repository, revision, platform, suite):
     """

report/firefox_code_coverage/codecoverage.py

@@ -76,7 +76,7 @@ def _save_tasks(response):
 
 @tenacity.retry(
     stop=tenacity.stop_after_attempt(5),
-    wait=tenacity.wait_incrementing(start=7, increment=7),
+    wait=tenacity.wait_exponential(multiplier=1, min=16, max=64),
     reraise=True,
 )
 def download_binary(url, path):