[
https://issues.apache.org/jira/browse/HADOOP-16186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16791957#comment-16791957
]
Steve Loughran commented on HADOOP-16186:
-----------------------------------------
{code}
[INFO] Running org.apache.hadoop.fs.s3a.ITestS3AEmptyDirectory
[ERROR] Tests run: 43, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 80.541
s <<< FAILURE! - in org.apache.hadoop.fs.s3a.ITestS3AFileSystemContract
[ERROR]
testRenameDirToSelf(org.apache.hadoop.fs.s3a.ITestS3AFileSystemContract) Time
elapsed: 1.773 s <<< ERROR!
java.lang.NullPointerException
at
org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.lambda$listChildren$4(DynamoDBMetadataStore.java:653)
at org.apache.hadoop.fs.s3a.Invoker.once(Invoker.java:109)
at org.apache.hadoop.fs.s3a.Invoker.lambda$retry$3(Invoker.java:265)
at org.apache.hadoop.fs.s3a.Invoker.retryUntranslated(Invoker.java:322)
at org.apache.hadoop.fs.s3a.Invoker.retry(Invoker.java:261)
at org.apache.hadoop.fs.s3a.Invoker.retry(Invoker.java:236)
at
org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.listChildren(DynamoDBMetadataStore.java:625)
at
org.apache.hadoop.fs.s3a.s3guard.DescendantsIterator.next(DescendantsIterator.java:132)
at
org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.deleteSubtree(DynamoDBMetadataStore.java:515)
at
org.apache.hadoop.fs.s3a.S3AFileSystem.innerDelete(S3AFileSystem.java:2042)
at
org.apache.hadoop.fs.s3a.S3AFileSystem.delete(S3AFileSystem.java:1951)
at
org.apache.hadoop.fs.FileSystemContractBaseTest.cleanupDir(FileSystemContractBaseTest.java:92)
at
org.apache.hadoop.fs.FileSystemContractBaseTest.tearDown(FileSystemContractBaseTest.java:85)
at sun.reflect.GeneratedMethodAccessor22.invoke(Unknown Source)
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:50)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:33)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
at
org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:745)
{code}
> NPE in ITestS3AFileSystemContract teardown in
> DynamoDBMetadataStore.lambda$listChildren
> ----------------------------------------------------------------------------------------
>
> Key: HADOOP-16186
> URL: https://issues.apache.org/jira/browse/HADOOP-16186
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Priority: Major
>
> Test run options. NPE in test teardown
> {code}
> -Dparallel-tests -DtestsThreadCount=6 -Ds3guard -Ddynamodb
> {code}
> If you look at the code, its *exactly* the place fixed in HADOOP-15827, a
> change which HADOOP-15947 reverted.
> There's clearly some codepath which can surface which is causing failures in
> some situations, and having multiple patches switching between the && and ||
> operators isn't going to to fix it
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