UrlConnectionHttpClient not working

[Samrose-Ahmed]

Describe the bug

Following https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/lambda-optimize-starttime.html , I tried to use UrlConnectionHttpClient. After adding it to my dependencies and using it in one DDB client explicitly, another SQS client (without explicitly specifying any .httpClient in builder) started using this client and just hanged infinitely on ReceiveMessage call. After removing the dependency, the issue went away.

Expected behavior

SQS receiveMessage should work.

Current behavior

Hanging infinitely on SQS receiveMessage call.

Steps to Reproduce

Add dependency

implementation("software.amazon.awssdk:url-connection-client:2.17+")

Run

val sqsClient: SqsClient = SqsClient.create()
val request = ReceiveMessageRequest.builder()
  .queueUrl(QUEUE_URL)
  .visibilityTimeout(6000)
  .waitTimeSeconds(3)
  .maxNumberOfMessages(10)
  .build()
val response = sqsClient.receiveMessage(request)
println("done")

Never gets to last line, hangs on receiveMessage.

Possible Solution

No response

Context

No response

AWS Java SDK version used

2.17.88

JDK version used

openjdk version "11.0.13" 2021-10-19 LTS OpenJDK Runtime Environment Corretto-11.0.13.8.1 (build 11.0.13+8-LTS) OpenJDK 64-Bit Server VM Corretto-11.0.13.8.1 (build 11.0.13+8-LTS, mixed mode)

Operating System and version

Ubuntu 20.04.2 LTS (WSL2)

[debora-ito]

Hi @Samrose-Ahmed thank you for reaching out.

A client will only use the UrlConnectionHttpClient if specified in the .httpClient option, so the hang can be related to something else.

• Are you removing the Apache Http Client from the depedencies? Can you share your build.gradle?
• Do you see any errors in the log?

[github-actions]

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[Samrose-Ahmed]

I am not removing the apache http client from my dependencies.

My entire build.gradle is

1: build.gradle.kts

dependencies { implementation("org.slf4j:slf4j-simple:1.7.30")

implementation("org.apache.httpcomponents:httpclient:4.5+")
implementation("org.apache.httpcomponents:fluent-hc:4.5+")
implementation("software.amazon.awssdk:dynamodb:2.17.+")
implementation("software.amazon.awssdk:dynamodb-enhanced:2.17+")
implementation("software.amazon.awssdk:url-connection-client:2.17+")
implementation("com.amazonaws:aws-java-sdk-s3:1.12+")
implementation("software.amazon.awssdk:s3:2.17.+")

implementation ("com.fasterxml.jackson.core:jackson-core:2.13.0")
implementation ("com.fasterxml.jackson.core:jackson-annotations:2.13.0")
implementation ("com.fasterxml.jackson.core:jackson-databind:2.13.0")
implementation ("com.fasterxml.jackson.module:jackson-module-kotlin:2.13.0")
implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.13.0")

implementation("io.javalin:javalin:4.1.+")
implementation("com.amazonaws.serverless:aws-serverless-java-container-core:1.6")

}

and

2: build.gradle.kts

dependencies { implementation(project(":ATCommon")) implementation("org.slf4j:slf4j-simple:1.7.32")

implementation("com.amazonaws:aws-java-sdk-s3:1.11.213") // for S3EventNotification class
implementation("software.amazon.awssdk:dynamodb:2.17.+")
implementation("software.amazon.awssdk:dynamodb-enhanced:2.17.+")
implementation("software.amazon.awssdk:sqs:2.17.+")
implementation("software.amazon.awssdk:s3:2.17.+")

}

where the second depends on the first. Removing the line:

implementation("software.amazon.awssdk:url-connection-client:2.17+")

fixed the issue.

I ran several times but I would not see any logs. I added a print before and after the receive message call and it would never get to the second print.

I saw the same issue when I specified the client explicitly or not, which made it quite confusing to track down to the dependency.

[debora-ito]

Can you enable the DEBUG logs or the wire logs and provide the logs of when the error occur?
I understand you don't see any errors in the logs, but I'm hoping the DEBUG logs can give us additional info.
See instructions on how to enable the logs here: https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/logging-slf4j.html#sdk-java-logging-request-response