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Posted to issues@hbase.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/09/13 17:55:08 UTC
[jira] [Created] (HBASE-4386) NPE in TaskMonitor
NPE in TaskMonitor
------------------
Key: HBASE-4386
URL: https://issues.apache.org/jira/browse/HBASE-4386
Project: HBase
Issue Type: Bug
Affects Versions: 0.92.0
Reporter: Todd Lipcon
Priority: Critical
Fix For: 0.92.0
Saw the following hitting /rs-status
<pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
at org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
at org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
at org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
at org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
at org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
at org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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[jira] [Updated] (HBASE-4386) NPE in TaskMonitor
Posted by "Todd Lipcon (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon updated HBASE-4386:
-------------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Committed for 92 and trunk
> NPE in TaskMonitor
> ------------------
>
> Key: HBASE-4386
> URL: https://issues.apache.org/jira/browse/HBASE-4386
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: hbase-4386.txt
>
>
> Saw the following hitting /rs-status
> <pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
> at org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
> at org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
> at org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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[jira] [Commented] (HBASE-4386) NPE in TaskMonitor
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13103711#comment-13103711 ]
Todd Lipcon commented on HBASE-4386:
------------------------------------
I think the issue is that items are added to the {{tasks}} list without synchronization. So the ArrayList can get into an inconsistent state where iterating it returns null.
> NPE in TaskMonitor
> ------------------
>
> Key: HBASE-4386
> URL: https://issues.apache.org/jira/browse/HBASE-4386
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.0
>
>
> Saw the following hitting /rs-status
> <pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
> at org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
> at org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
> at org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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[jira] [Commented] (HBASE-4386) NPE in TaskMonitor
Posted by "Hudson (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13121687#comment-13121687 ]
Hudson commented on HBASE-4386:
-------------------------------
Integrated in HBase-0.92 #47 (See [https://builds.apache.org/job/HBase-0.92/47/])
HBASE-4386 Fix a potential NPE in TaskMonitor
todd :
Files :
* /hbase/branches/0.92/CHANGES.txt
* /hbase/branches/0.92/src/main/java/org/apache/hadoop/hbase/monitoring/TaskMonitor.java
> NPE in TaskMonitor
> ------------------
>
> Key: HBASE-4386
> URL: https://issues.apache.org/jira/browse/HBASE-4386
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: hbase-4386.txt
>
>
> Saw the following hitting /rs-status
> <pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
> at org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
> at org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
> at org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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[jira] [Assigned] (HBASE-4386) NPE in TaskMonitor
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon reassigned HBASE-4386:
----------------------------------
Assignee: Todd Lipcon
> NPE in TaskMonitor
> ------------------
>
> Key: HBASE-4386
> URL: https://issues.apache.org/jira/browse/HBASE-4386
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.0
>
>
> Saw the following hitting /rs-status
> <pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
> at org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
> at org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
> at org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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[jira] [Updated] (HBASE-4386) NPE in TaskMonitor
Posted by "Todd Lipcon (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon updated HBASE-4386:
-------------------------------
Attachment: hbase-4386.txt
> NPE in TaskMonitor
> ------------------
>
> Key: HBASE-4386
> URL: https://issues.apache.org/jira/browse/HBASE-4386
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: hbase-4386.txt
>
>
> Saw the following hitting /rs-status
> <pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
> at org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
> at org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
> at org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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[jira] [Updated] (HBASE-4386) NPE in TaskMonitor
Posted by "Todd Lipcon (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon updated HBASE-4386:
-------------------------------
Status: Patch Available (was: Open)
> NPE in TaskMonitor
> ------------------
>
> Key: HBASE-4386
> URL: https://issues.apache.org/jira/browse/HBASE-4386
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: hbase-4386.txt
>
>
> Saw the following hitting /rs-status
> <pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
> at org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
> at org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
> at org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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[jira] [Commented] (HBASE-4386) NPE in TaskMonitor
Posted by "stack (Commented) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-4386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13120580#comment-13120580 ]
stack commented on HBASE-4386:
------------------------------
This seems reasonable. All other accesses on tasks are synchronized on this. +1.
> NPE in TaskMonitor
> ------------------
>
> Key: HBASE-4386
> URL: https://issues.apache.org/jira/browse/HBASE-4386
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: hbase-4386.txt
>
>
> Saw the following hitting /rs-status
> <pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused by:</h3><pre>java.lang.NullPointerException
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
> at org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
> at org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
> at org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
> at org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
> at org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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