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https://issues.apache.org/jira/browse/HADOOP-15833?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16643419#comment-16643419
 ] 

Steve Loughran commented on HADOOP-15833:
-----------------------------------------

and {{ITestS3GuardToolDynamoDB.testSetCapacityFailFastIfNotGuarded()}} needs to 
clear bucket-specific setting before running the s3guard command, so s3guard 
isn't starting. I don't understand why this only happens sometimes though, 
given the per-bucket settings are set in auth-keys.xml and the same for serial 
as parallel

{code}
[ERROR] 
testSetCapacityFailFastIfNotGuarded(org.apache.hadoop.fs.s3a.s3guard.ITestS3GuardToolDynamoDB)
  Time elapsed: 7.164 s  <<< ERROR!
java.io.FileNotFoundException: DynamoDB table 
'3dd402c7-ff1b-4906-91ab-7831acd7d81f' does not exist in region eu-west-1; 
auto-creation is turned off
        at 
org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.initTable(DynamoDBMetadataStore.java:1213)
        at 
org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.initialize(DynamoDBMetadataStore.java:356)
        at 
org.apache.hadoop.fs.s3a.s3guard.S3Guard.getMetadataStore(S3Guard.java:99)
        at 
org.apache.hadoop.fs.s3a.S3AFileSystem.initialize(S3AFileSystem.java:378)
        at 
org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3354)
        at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:124)
        at 
org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3403)
        at org.apache.hadoop.fs.FileSystem$Cache.getUnique(FileSystem.java:3377)
        at org.apache.hadoop.fs.FileSystem.newInstance(FileSystem.java:530)
        at 
org.apache.hadoop.fs.s3a.s3guard.S3GuardTool$SetCapacity.run(S3GuardTool.java:513)
        at 
org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.run(S3GuardTool.java:353)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
        at 
org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.run(S3GuardTool.java:1552)
        at 
org.apache.hadoop.fs.s3a.s3guard.AbstractS3GuardToolTestBase.run(AbstractS3GuardToolTestBase.java:115)
        at 
org.apache.hadoop.fs.s3a.s3guard.AbstractS3GuardToolTestBase.lambda$testSetCapacityFailFastIfNotGuarded$2(AbstractS3GuardToolTestBase.java:331)
        at 
org.apache.hadoop.test.LambdaTestUtils.intercept(LambdaTestUtils.java:494)
        at 
org.apache.hadoop.test.LambdaTestUtils.intercept(LambdaTestUtils.java:380)
        at 
org.apache.hadoop.test.LambdaTestUtils.intercept(LambdaTestUtils.java:449)
        at 
org.apache.hadoop.fs.s3a.s3guard.AbstractS3GuardToolTestBase.testSetCapacityFailFastIfNotGuarded(AbstractS3GuardToolTestBase.java:330)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
        at 
org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
Caused by: com.amazonaws.services.dynamodbv2.model.ResourceNotFoundException: 
Requested resource not found: Table: 3dd402c7-ff1b-4906-91ab-7831acd7d81f not 
found (Service: AmazonDynamoDBv2; Status Code: 400; Error Code: 
ResourceNotFoundException; Request ID: 
7FOARITHKRAUA6MRCM50NLHKN3VV4KQNSO5AEMVJF66Q9ASUAAJG)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleErrorResponse(AmazonHttpClient.java:1640)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1304)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1058)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:743)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:717)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:699)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:667)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:649)
        at 
com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:513)
        at 
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.doInvoke(AmazonDynamoDBClient.java:3443)
        at 
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.invoke(AmazonDynamoDBClient.java:3419)
        at 
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.executeDescribeTable(AmazonDynamoDBClient.java:1660)
        at 
com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.describeTable(AmazonDynamoDBClient.java:1635)
        at 
com.amazonaws.services.dynamodbv2.document.Table.describe(Table.java:137)
        at 
org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.initTable(DynamoDBMetadataStore.java:1174)
        ... 30 more
{code}

> ITestS3GuardToolDynamoDB fails intermittently in parallel runs
> --------------------------------------------------------------
>
>                 Key: HADOOP-15833
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15833
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3, test
>    Affects Versions: 3.2.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>
> intermittent failure of a pair of {{ITestS3GuardToolDynamoDB}} tests in 
> parallel runs. They don't seem to fail in sequential mode.



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