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https://issues.apache.org/jira/browse/HDFS-15628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kihwal Lee updated HDFS-15628:
------------------------------
Fix Version/s: 3.2.3
> HttpFS server throws NPE if a file is a symlink
> -----------------------------------------------
>
> Key: HDFS-15628
> URL: https://issues.apache.org/jira/browse/HDFS-15628
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: fs, httpfs
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Fix For: 3.3.1, 3.4.0, 3.2.3
>
> Attachments: HDFS-15628.001.patch, HDFS-15628.002.patch
>
>
> If a directory containing a symlink is listed, the client (WebHfdsFileSystem)
> blows up with a NPE. If {{type}} is {{SYMLINK}}, there must be {{symlink}}
> field whose value is the link target string. HttpFS returns a response
> without {{symlink}} filed. {{WebHfdsFileSystem}} assumes it is there for a
> symlink and blindly tries to parse it, causing NPE.
> This is not an issue if the destination cluster does not have symlinks
> enabled.
>
> {code:bash}
> java.io.IOException: localhost:55901: Response decoding failure:
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$FsPathResponseRunner.getResponse(WebHdfsFileSystem.java:967)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.runWithRetry(WebHdfsFileSystem.java:816)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.access$100(WebHdfsFileSystem.java:638)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner$1.run(WebHdfsFileSystem.java:676)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1899)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$AbstractRunner.run(WebHdfsFileSystem.java:672)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem.listStatus(WebHdfsFileSystem.java:1731)
> at
> org.apache.hadoop.fs.http.client.BaseTestHttpFSWith.testListSymLinkStatus(BaseTestHttpFSWith.java:388)
> at
> org.apache.hadoop.fs.http.client.BaseTestHttpFSWith.operation(BaseTestHttpFSWith.java:1230)
> at
> org.apache.hadoop.fs.http.client.BaseTestHttpFSWith.testOperation(BaseTestHttpFSWith.java:1363)
> 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$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.apache.hadoop.test.TestHdfsHelper$HdfsStatement.evaluate(TestHdfsHelper.java:95)
> at
> org.apache.hadoop.test.TestDirHelper$1.evaluate(TestDirHelper.java:106)
> at
> org.apache.hadoop.test.TestExceptionHelper$1.evaluate(TestExceptionHelper.java:42)
> at
> org.apache.hadoop.test.TestJettyHelper$1.evaluate(TestJettyHelper.java:74)
> at
> org.apache.hadoop.test.TestDirHelper$1.evaluate(TestDirHelper.java:106)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.junit.runners.Suite.runChild(Suite.java:128)
> at org.junit.runners.Suite.runChild(Suite.java:27)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
> at
> com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
> at
> com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
> at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.DFSUtilClient.string2Bytes(DFSUtilClient.java:116)
> at
> org.apache.hadoop.hdfs.web.JsonUtilClient.toFileStatus(JsonUtilClient.java:131)
> at
> org.apache.hadoop.hdfs.web.JsonUtilClient.toHdfsFileStatusArray(JsonUtilClient.java:215)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$15.decodeResponse(WebHdfsFileSystem.java:1723)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$15.decodeResponse(WebHdfsFileSystem.java:1719)
> at
> org.apache.hadoop.hdfs.web.WebHdfsFileSystem$FsPathResponseRunner.getResponse(WebHdfsFileSystem.java:962)
> ... 46 more
> {code}
>
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