Error in Connector Builder UI while Testing Source

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Summary

User encounters an internal error when testing a source in the Connector Builder UI, indicating a potential issue with the local Docker setup on EC2. The error message suggests a failure in creating a directory due to a NoSuchFileException.


Question

I’m trying to just run the https://docs.airbyte.com/connector-development/connector-builder-ui/tutorial|Tutorial for using the Builder and running into this error while trying to use it to create a Source. When it is Testing the Source, I get the below errors
I think there may be a problem in my local setup, I’m running in Docker on an EC2. Same setup works fine on Airbyte Cloud
Answers in <#C01AHCD885S|ask-ai> weren’t helpful

Internal message: Check failed because of an internal error
Failure origin: source

Stacktrace
io.temporal.failure.ActivityFailure: Activity with activityType='RunWithJobOutput' failed: 'Activity task failed'. scheduledEventId=12, startedEventId=13, activityId=76db7ec7-2af3-3ffd-be69-e047f6ea8ebf, identity='1@1073d50fce7a', retryState=RETRY_STATE_MAXIMUM_ATTEMPTS_REACHED
	at java.base/java.lang.Thread.getStackTrace(Thread.java:2450)
	at io.temporal.internal.sync.ActivityStubBase.execute(ActivityStubBase.java:49)
	at io.temporal.internal.sync.ActivityInvocationHandler.lambda$getActivityFunc$0(ActivityInvocationHandler.java:83)
	at io.temporal.internal.sync.ActivityInvocationHandlerBase.invoke(ActivityInvocationHandlerBase.java:60)
	at jdk.proxy2/jdk.proxy2.$Proxy87.runWithJobOutput(Unknown Source)
	at io.airbyte.workers.temporal.check.connection.CheckConnectionWorkflowImpl.run(CheckConnectionWorkflowImpl.java:55)
	at CheckConnectionWorkflowImplProxy.run$accessor$sPCBT5ok(Unknown Source)
	at CheckConnectionWorkflowImplProxy$auxiliary$3fCf6fl6.call(Unknown Source)
	at io.airbyte.micronaut.temporal.TemporalActivityStubInterceptor.execute(TemporalActivityStubInterceptor.java:79)
	at CheckConnectionWorkflowImplProxy.run(Unknown Source)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at io.temporal.internal.sync.POJOWorkflowImplementationFactory$POJOWorkflowImplementation$RootWorkflowInboundCallsInterceptor.execute(POJOWorkflowImplementationFactory.java:339)
	at io.temporal.internal.sync.POJOWorkflowImplementationFactory$POJOWorkflowImplementation.execute(POJOWorkflowImplementationFactory.java:314)
	at io.temporal.internal.sync.WorkflowExecutionHandler.runWorkflowMethod(WorkflowExecutionHandler.java:70)
	at io.temporal.internal.sync.SyncWorkflow.lambda$start$0(SyncWorkflow.java:135)
	at io.temporal.internal.sync.CancellationScopeImpl.run(CancellationScopeImpl.java:102)
	at io.temporal.internal.sync.WorkflowThreadImpl$RunnableWrapper.run(WorkflowThreadImpl.java:107)
	at io.temporal.worker.ActiveThreadReportingExecutor.lambda$submit$0(ActiveThreadReportingExecutor.java:53)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: io.temporal.failure.ApplicationFailure: message='Unexpected error while getting checking connection.', type='io.airbyte.workers.exception.WorkerException', nonRetryable=false
	at io.airbyte.workers.general.DefaultCheckConnectionWorker.run(DefaultCheckConnectionWorker.java:135)
	at io.airbyte.workers.general.DefaultCheckConnectionWorker.run(DefaultCheckConnectionWorker.java:44)
	at io.airbyte.workers.temporal.TemporalAttemptExecution.get(TemporalAttemptExecution.java:142)
	at io.airbyte.workers.temporal.check.connection.CheckConnectionActivityImpl.lambda$runWithJobOutput$1(CheckConnectionActivityImpl.java:226)
	at io.airbyte.commons.temporal.HeartbeatUtils.withBackgroundHeartbeat(HeartbeatUtils.java:57)
	... 14 more
Caused by: io.temporal.failure.ApplicationFailure: message='/tmp/workspace/29ab916c-439f-4fba-bdfa-3835d3e5399e/0', type='io.airbyte.workers.exception.WorkerException', nonRetryable=false
	at io.airbyte.workers.process.DockerProcessFactory.create(DockerProcessFactory.java:191)
	at io.airbyte.workers.process.AirbyteIntegrationLauncher.check(AirbyteIntegrationLauncher.java:149)
	at io.airbyte.workers.general.DefaultCheckConnectionWorker.run(DefaultCheckConnectionWorker.java:71)
	... 18 more
Caused by: io.temporal.failure.ApplicationFailure: message='/tmp/workspace/29ab916c-439f-4fba-bdfa-3835d3e5399e/0', type='java.nio.file.NoSuchFileException', nonRetryable=false
	at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92)
	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
	at java.base/sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:438)
	at java.base/java.nio.file.Files.createDirectory(Files.java:699)
	at io.airbyte.workers.process.DockerProcessFactory.create(DockerProcessFactory.java:121)
	... 20 more```

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<sub>
['connector-builder', 'docker', 'ec2', 'source-testing', 'internal-error']
</sub>