[jira] [Updated] (HDFS-15628) HttpFS server throws NPE if a file is a symlink

2020-12-15 Thread Xiaoqiao He (Jira) 


 [ 
https://issues.apache.org/jira/browse/HDFS-15628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Xiaoqiao He updated HDFS-15628:
---
Fix Version/s: 3.2.2

Add fix version 3.2.2 + 3.2.3, Please update fix version tag in time when 
commit and backport, Thanks.

> 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: 3.2.2, 3.3.1, 3.4.0, 3.1.5, 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

[jira] [Updated] (HDFS-15628) HttpFS server throws NPE if a file is a symlink

2020-10-16 Thread Kihwal Lee (Jira) 


 [ 
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: 3.1.5

> 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, 3.1.5, 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

[jira] [Updated] (HDFS-15628) HttpFS server throws NPE if a file is a symlink

2020-10-14 Thread Kihwal Lee (Jira) 


 [ 
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

[jira] [Updated] (HDFS-15628) HttpFS server throws NPE if a file is a symlink

2020-10-14 Thread Kihwal Lee (Jira) 


 [ 
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: 3.4.0
   3.3.1
 Hadoop Flags: Reviewed
   Resolution: Fixed
   Status: Resolved  (was: Patch Available)

> 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
>
> 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

[jira] [Updated] (HDFS-15628) HttpFS server throws NPE if a file is a symlink

2020-10-14 Thread Kihwal Lee (Jira) 


 [ 
https://issues.apache.org/jira/browse/HDFS-15628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Kihwal Lee updated HDFS-15628:
--
Summary: HttpFS server throws NPE if a file is a symlink  (was: https 
throws NPE if a file is a symlink)

> 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
> 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