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https://issues.apache.org/jira/browse/HADOOP-16043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Gabor Bota reassigned HADOOP-16043:
-----------------------------------
Assignee: Gabor Bota
> NPE in ITestDynamoDBMetadataStore when fs.s3a.s3guard.ddb.table is not set
> --------------------------------------------------------------------------
>
> Key: HADOOP-16043
> URL: https://issues.apache.org/jira/browse/HADOOP-16043
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/s3
> Affects Versions: 3.2.0
> Reporter: Adam Antal
> Assignee: Gabor Bota
> Priority: Major
>
> When running {{org.apache.hadoop.fs.s3a.s3guard.ITestDynamoDBMetadataStore}}
> integration test, I got the following stack trace:
> {code:java}
> [ERROR] org.apache.hadoop.fs.s3a.s3guard.ITestDynamoDBMetadataStore Time
> elapsed: 0.333 s <<< ERROR!
> java.lang.NullPointerException
> at
> org.apache.hadoop.fs.s3a.s3guard.ITestDynamoDBMetadataStore.beforeClassSetup(ITestDynamoDBMetadataStore.java:164)
> 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: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.RunBefores.evaluate(RunBefores.java:24)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
> at
> org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
> at
> org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
> at
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
> at
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
> at
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
> {code}
> The NPE happened here:
> {code:java}
> assertTrue("Test DynamoDB table name: '"
> + S3GUARD_DDB_TEST_TABLE_NAME_KEY + "' and production table name: '"
> + S3GUARD_DDB_TABLE_NAME_KEY + "' can not be the same.",
> !conf.get(S3GUARD_DDB_TABLE_NAME_KEY).equals(testDynamoDBTableName));
> {code}
> The problem is that though we check previously whether the variable
> testDynamoDBTableName ({{fs.s3a.s3guard.ddb.test.table}} config) is not null,
> but we don't do the same for {{fs.s3a.s3guard.ddb.table}}
> ({{S3GUARD_DDB_TABLE_NAME_KEY}}) before calling the .equals(), thus causing
> an NPE.
> Since we don't need the {{fs.s3a.s3guard.ddb.table}} config for the test, we
> should check first whether that config is given or not, and only comparing
> the two configs if they both exist.
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