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https://issues.apache.org/jira/browse/HADOOP-14129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15889313#comment-15889313
 ] 

Mingliang Liu commented on HADOOP-14129:
----------------------------------------

I just re-produced the same error...

{code}
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.119 sec <<< 
FAILURE! - in org.apache.hadoop.fs.s3a.ITestS3ACredentialsInURL
testInstantiateFromURL(org.apache.hadoop.fs.s3a.ITestS3ACredentialsInURL)  Time 
elapsed: 2.069 sec  <<< ERROR!
java.io.InterruptedIOException: initTable: com.amazonaws.AmazonClientException: 
No AWS Credentials provided by BasicAWSCredentialsProvider 
EnvironmentVariableCredentialsProvider SharedInstanceProfileCredentialsProvider 
: com.amazonaws.SdkClientException: Unable to load credentials from service 
endpoint
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at 
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
        at 
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
        at 
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
        at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
        at sun.net.www.http.HttpClient.New(HttpClient.java:308)
        at sun.net.www.http.HttpClient.New(HttpClient.java:326)
        at 
sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
        at 
sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105)
        at 
sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
        at 
sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
        at 
com.amazonaws.internal.ConnectionUtils.connectToEndpoint(ConnectionUtils.java:47)
        at 
com.amazonaws.internal.EC2CredentialsUtils.readResource(EC2CredentialsUtils.java:106)
        at 
com.amazonaws.internal.EC2CredentialsUtils.readResource(EC2CredentialsUtils.java:77)
        at 
com.amazonaws.auth.InstanceProfileCredentialsProvider$InstanceMetadataCredentialsEndpointProvider.getCredentialsEndpoint(InstanceProfileCredentialsProvider.java:156)
        at 
com.amazonaws.auth.EC2CredentialsFetcher.fetchCredentials(EC2CredentialsFetcher.java:121)
        at 
com.amazonaws.auth.EC2CredentialsFetcher.getCredentials(EC2CredentialsFetcher.java:82)
        at 
com.amazonaws.auth.InstanceProfileCredentialsProvider.getCredentials(InstanceProfileCredentialsProvider.java:141)
        at 
org.apache.hadoop.fs.s3a.AWSCredentialProviderList.getCredentials(AWSCredentialProviderList.java:129)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.getCredentialsFromContext(AmazonHttpClient.java:1115)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.runBeforeRequestHandlers(AmazonHttpClient.java:764)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:728)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:721)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:704)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:672)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:654)
        at 
com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:518)
        at 
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.doInvoke(AmazonDynamoDBClient.java:1831)
        at 
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.invoke(AmazonDynamoDBClient.java:1807)
        at 
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.describeTable(AmazonDynamoDBClient.java:1001)
        at 
com.amazonaws.services.dynamodbv2.document.Table.describe(Table.java:137)
        at 
org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.initTable(DynamoDBMetadataStore.java:657)
        at 
org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.initialize(DynamoDBMetadataStore.java:247)
        at 
org.apache.hadoop.fs.s3a.s3guard.S3Guard.getMetadataStore(S3Guard.java:92)
        at 
org.apache.hadoop.fs.s3a.S3AFileSystem.initialize(S3AFileSystem.java:280)
        at 
org.apache.hadoop.fs.s3a.S3ATestUtils.createTestFileSystem(S3ATestUtils.java:121)
        at 
org.apache.hadoop.fs.s3a.S3ATestUtils.createTestFileSystem(S3ATestUtils.java:79)
        at 
org.apache.hadoop.fs.s3a.ITestS3ACredentialsInURL.testInstantiateFromURL(ITestS3ACredentialsInURL.java:86)
{code}
It seems this happens when we create a test file system, which will trigger 
S3Guard to operate DDB. So should we put a fix *before* that line? perhaps 
{{conf.unset(S3_METADATA_STORE_IMPL);}}

> ITestS3ACredentialsInURL sometimes fails
> ----------------------------------------
>
>                 Key: HADOOP-14129
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14129
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: HADOOP-13345
>            Reporter: Sean Mackrory
>            Assignee: Sean Mackrory
>             Fix For: HADOOP-13345
>
>         Attachments: HADOOP-14129-HADOOP-13345.001.patch, 
> HADOOP-14129-HADOOP-13345.002.patch
>
>
> This test sometimes fails. I believe it's expected that DynamoDB doesn't have 
> access to the credentials if they're embedded in the URL instead of the 
> configuration (and IMO that's fine - since the functionality hasn't been in 
> previous releases and since we want to discourage this practice especially 
> now that there are better alternatives). Weirdly, I only sometimes get this 
> failure on the HADOOP-13345 branch. But if the problem turns out to be what I 
> think it is, a simple Assume should fix it.



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