AWS SDK is failed to connect to S3 using instance pofile

[VAIBHAVCES]

I am inside a EC2 instance where I have configured IAM roles and from there I am using aws sdk to connect to s3 bucket and during that I am getting error like this

com.amazonaws.SdkClientException: Failed to connect to service endpoint:
	at com.amazonaws.internal.EC2ResourceFetcher.doReadResource(EC2ResourceFetcher.java:100)
	at com.amazonaws.internal.EC2ResourceFetcher.doReadResource(EC2ResourceFetcher.java:70)
	at com.amazonaws.internal.InstanceMetadataServiceResourceFetcher.readResource(InstanceMetadataServiceResourceFetcher.java:75)
	at com.amazonaws.internal.EC2ResourceFetcher.readResource(EC2ResourceFetcher.java:66)
	at com.amazonaws.auth.InstanceMetadataServiceCredentialsFetcher.getCredentialsEndpoint(InstanceMetadataServiceCredentialsFetcher.java:60)
	at com.amazonaws.auth.InstanceMetadataServiceCredentialsFetcher.getCredentialsResponse(InstanceMetadataServiceCredentialsFetcher.java:48)
	at com.amazonaws.auth.BaseCredentialsFetcher.fetchCredentials(BaseCredentialsFetcher.java:124)
	at com.amazonaws.auth.BaseCredentialsFetcher.getCredentials(BaseCredentialsFetcher.java:80)
	at com.amazonaws.auth.InstanceProfileCredentialsProvider.getCredentials(InstanceProfileCredentialsProvider.java:166)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.getCredentialsFromContext(AmazonHttpClient.java:1269)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.runBeforeRequestHandlers(AmazonHttpClient.java:845)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:794)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:781)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:755)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:715)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:697)
	at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:561)

But when I am using aws cli in the same ec2 intsance it is working fine. My java application running inside the ec2 instance is a java application running as a docker container where I am trying to do this operation.

Can anyone please explain me reason for this or can anyone explain what does error message speciffy
Can I conclude that it is unable to use instance profile to authenticate to s3

[yasminetalby]

Hello @VAIBHAVCES ,

There is not enough information provided here to fully investigate the origin of the behavior.
What version of the SDK are you using? Could you please provide the full stack trace as well as a code sample to illustrate your use case?

Based on the information you have provided, my first guess is that the behavior you are experiencing is similar to the following cases: #2285 #2365.
Since the release of the new Instance Metadata Service v2 in AWS Java SDK v1.11.678, we have seen various reports of increased latency on the service side which have caused similar behaviors.

Best,

Yasmine