[jira] [Updated] (HDFS-17099) Fix Null Pointer Exception when stop namesystem in HDFS
[
https://issues.apache.org/jira/browse/HDFS-17099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xiaoqiao He updated HDFS-17099:
---
Priority: Major (was: Critical)
> Fix Null Pointer Exception when stop namesystem in HDFS
> ---
>
> Key: HDFS-17099
> URL: https://issues.apache.org/jira/browse/HDFS-17099
> Project: Hadoop HDFS
> Issue Type: Bug
>Reporter: ConfX
>Assignee: ConfX
>Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.0
>
> Attachments: reproduce.sh
>
>
> h2. What happend:
> Got NullPointerException when stop namesystem in HDFS.
> h2. Buggy code:
>
> {code:java}
> void stopActiveServices() {
> ...
> if (dir != null && getFSImage() != null) {
> if (getFSImage().editLog != null) { // <--- Check whether editLog is
> null
> getFSImage().editLog.close();
> }
> // Update the fsimage with the last txid that we wrote
> // so that the tailer starts from the right spot.
> getFSImage().updateLastAppliedTxIdFromWritten(); // <--- BUG: Even if
> editLog is null, this line will still be executed and cause nullpointer
> exception
> }
> ...
> } public void updateLastAppliedTxIdFromWritten() {
> this.lastAppliedTxId = editLog.getLastWrittenTxId(); // < This will
> cause nullpointer exception if editLog is null
> } {code}
> h2. StackTrace:
>
> {code:java}
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.updateLastAppliedTxIdFromWritten(FSImage.java:1553)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.stopActiveServices(FSNamesystem.java:1463)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.close(FSNamesystem.java:1815)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.(FSNamesystem.java:1017)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.initialize(SecondaryNameNode.java:248)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.(SecondaryNameNode.java:194)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.(SecondaryNameNode.java:181)
> {code}
> h2. How to reproduce:
> (1) Set {{dfs.namenode.top.windows.minutes}} to {{{}37914516,32,0{}}}; or set
> {{dfs.namenode.top.window.num.buckets}} to {{{}244111242{}}}.
> (2) Run test:
> {{org.apache.hadoop.hdfs.server.namenode.TestNameNodeHttpServerXFrame#testSecondaryNameNodeXFrame}}
> h2. What's more:
> I'm still investigating how the parameter
> {{dfs.namenode.top.windows.minutes}} triggered the buggy code.
>
> For an easy reproduction, run the reproduce.sh in the attachment.
> We are happy to provide a patch if this issue is confirmed.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
-
To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
[jira] [Updated] (HDFS-17099) Fix Null Pointer Exception when stop namesystem in HDFS
[
https://issues.apache.org/jira/browse/HDFS-17099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xiaoqiao He updated HDFS-17099:
---
Summary: Fix Null Pointer Exception when stop namesystem in HDFS (was:
Null Pointer Exception when stop namesystem in HDFS)
> Fix Null Pointer Exception when stop namesystem in HDFS
> ---
>
> Key: HDFS-17099
> URL: https://issues.apache.org/jira/browse/HDFS-17099
> Project: Hadoop HDFS
> Issue Type: Bug
>Reporter: ConfX
>Assignee: ConfX
>Priority: Critical
> Labels: pull-request-available
> Attachments: reproduce.sh
>
>
> h2. What happend:
> Got NullPointerException when stop namesystem in HDFS.
> h2. Buggy code:
>
> {code:java}
> void stopActiveServices() {
> ...
> if (dir != null && getFSImage() != null) {
> if (getFSImage().editLog != null) { // <--- Check whether editLog is
> null
> getFSImage().editLog.close();
> }
> // Update the fsimage with the last txid that we wrote
> // so that the tailer starts from the right spot.
> getFSImage().updateLastAppliedTxIdFromWritten(); // <--- BUG: Even if
> editLog is null, this line will still be executed and cause nullpointer
> exception
> }
> ...
> } public void updateLastAppliedTxIdFromWritten() {
> this.lastAppliedTxId = editLog.getLastWrittenTxId(); // < This will
> cause nullpointer exception if editLog is null
> } {code}
> h2. StackTrace:
>
> {code:java}
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.updateLastAppliedTxIdFromWritten(FSImage.java:1553)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.stopActiveServices(FSNamesystem.java:1463)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.close(FSNamesystem.java:1815)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.(FSNamesystem.java:1017)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.initialize(SecondaryNameNode.java:248)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.(SecondaryNameNode.java:194)
> at
> org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode.(SecondaryNameNode.java:181)
> {code}
> h2. How to reproduce:
> (1) Set {{dfs.namenode.top.windows.minutes}} to {{{}37914516,32,0{}}}; or set
> {{dfs.namenode.top.window.num.buckets}} to {{{}244111242{}}}.
> (2) Run test:
> {{org.apache.hadoop.hdfs.server.namenode.TestNameNodeHttpServerXFrame#testSecondaryNameNodeXFrame}}
> h2. What's more:
> I'm still investigating how the parameter
> {{dfs.namenode.top.windows.minutes}} triggered the buggy code.
>
> For an easy reproduction, run the reproduce.sh in the attachment.
> We are happy to provide a patch if this issue is confirmed.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
-
To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
