You are viewing a plain text version of this content. The canonical link for it is here.
Posted to common-dev@hadoop.apache.org by "David Bowen (JIRA)" <ji...@apache.org> on 2007/03/22 00:50:32 UTC
[jira] Created: (HADOOP-1140) Deadlock bug involving the
o.a.h.metrics package
Deadlock bug involving the o.a.h.metrics package
------------------------------------------------
Key: HADOOP-1140
URL: https://issues.apache.org/jira/browse/HADOOP-1140
Project: Hadoop
Issue Type: Bug
Reporter: David Bowen
Assigned To: David Bowen
Hi David,
Our nightly benchmarks are occasionally failing (2 to 4 of them per night) due to this deadlock in the JT that looks to be caused by Simon. Do you have time to fix this in the morning?
Thanks,
Nige
Found one Java-level deadlock:
=============================
"expireLaunchingTasks":
waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
which is held by "IPC Server handler 8 on 50020"
"IPC Server handler 8 on 50020":
waiting to lock monitor 0x08141630 (object 0x57de46b8, a com.yahoo.simon.hadoop.metrics.SimonContext),
which is held by "Timer-0"
"Timer-0":
waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
which is held by "IPC Server handler 8 on 50020"
Java stack information for the threads listed above:
===================================================
"expireLaunchingTasks":
at org.apache.hadoop.mapred.JobTracker$ExpireLaunchingTasks.run(JobTracker.java:152)
- waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
at java.lang.Thread.run(Thread.java:619)
"IPC Server handler 8 on 50020":
at org.apache.hadoop.metrics.spi.AbstractMetricsContext.createRecord(AbstractMetricsContext.java:192)
- waiting to lock <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
at org.apache.hadoop.mapred.JobInProgress.<init>(JobInProgress.java:130)
at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:1383)
- locked <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:336)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:559)
"Timer-0":
at org.apache.hadoop.mapred.JobTracker.getRunningJobs(JobTracker.java:943)
- waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
at org.apache.hadoop.mapred.JobTracker$JobTrackerMetrics.doUpdates(JobTracker.java:429)
at org.apache.hadoop.metrics.spi.AbstractMetricsContext.timerEvent(AbstractMetricsContext.java:275)
- locked <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
at org.apache.hadoop.metrics.spi.AbstractMetricsContext.access$000(AbstractMetricsContext.java:48)
at org.apache.hadoop.metrics.spi.AbstractMetricsContext$1.run(AbstractMetricsContext.java:242)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
Found 1 deadlock.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Updated: (HADOOP-1140) Deadlock bug involving the
o.a.h.metrics package
Posted by "Doug Cutting (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-1140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Doug Cutting updated HADOOP-1140:
---------------------------------
Resolution: Fixed
Status: Resolved (was: Patch Available)
I just committed this. Thanks, David!
> Deadlock bug involving the o.a.h.metrics package
> ------------------------------------------------
>
> Key: HADOOP-1140
> URL: https://issues.apache.org/jira/browse/HADOOP-1140
> Project: Hadoop
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.12.1
> Reporter: David Bowen
> Assigned To: David Bowen
> Fix For: 0.12.2
>
> Attachments: 1140.patch
>
>
> Hi David,
> Our nightly benchmarks are occasionally failing (2 to 4 of them per night) due to this deadlock in the JT that looks to be caused by Simon. Do you have time to fix this in the morning?
> Thanks,
> Nige
> Found one Java-level deadlock:
> =============================
> "expireLaunchingTasks":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> "IPC Server handler 8 on 50020":
> waiting to lock monitor 0x08141630 (object 0x57de46b8, a com.yahoo.simon.hadoop.metrics.SimonContext),
> which is held by "Timer-0"
> "Timer-0":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> Java stack information for the threads listed above:
> ===================================================
> "expireLaunchingTasks":
> at org.apache.hadoop.mapred.JobTracker$ExpireLaunchingTasks.run(JobTracker.java:152)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at java.lang.Thread.run(Thread.java:619)
> "IPC Server handler 8 on 50020":
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.createRecord(AbstractMetricsContext.java:192)
> - waiting to lock <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.mapred.JobInProgress.<init>(JobInProgress.java:130)
> at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:1383)
> - locked <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:336)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:559)
> "Timer-0":
> at org.apache.hadoop.mapred.JobTracker.getRunningJobs(JobTracker.java:943)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at org.apache.hadoop.mapred.JobTracker$JobTrackerMetrics.doUpdates(JobTracker.java:429)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.timerEvent(AbstractMetricsContext.java:275)
> - locked <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.access$000(AbstractMetricsContext.java:48)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext$1.run(AbstractMetricsContext.java:242)
> at java.util.TimerThread.mainLoop(Timer.java:512)
> at java.util.TimerThread.run(Timer.java:462)
> Found 1 deadlock.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Commented: (HADOOP-1140) Deadlock bug involving the
o.a.h.metrics package
Posted by "David Bowen (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-1140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12483201 ]
David Bowen commented on HADOOP-1140:
-------------------------------------
I think this fix should go in 12.2, since it is a serious bug with a pretty small, safe fix. The bug showed up when using the Simon metrics implementation package, but I believe it could occur also with any other metrics implementation package, including the null one.
> Deadlock bug involving the o.a.h.metrics package
> ------------------------------------------------
>
> Key: HADOOP-1140
> URL: https://issues.apache.org/jira/browse/HADOOP-1140
> Project: Hadoop
> Issue Type: Bug
> Reporter: David Bowen
> Assigned To: David Bowen
> Attachments: 1140.patch
>
>
> Hi David,
> Our nightly benchmarks are occasionally failing (2 to 4 of them per night) due to this deadlock in the JT that looks to be caused by Simon. Do you have time to fix this in the morning?
> Thanks,
> Nige
> Found one Java-level deadlock:
> =============================
> "expireLaunchingTasks":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> "IPC Server handler 8 on 50020":
> waiting to lock monitor 0x08141630 (object 0x57de46b8, a com.yahoo.simon.hadoop.metrics.SimonContext),
> which is held by "Timer-0"
> "Timer-0":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> Java stack information for the threads listed above:
> ===================================================
> "expireLaunchingTasks":
> at org.apache.hadoop.mapred.JobTracker$ExpireLaunchingTasks.run(JobTracker.java:152)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at java.lang.Thread.run(Thread.java:619)
> "IPC Server handler 8 on 50020":
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.createRecord(AbstractMetricsContext.java:192)
> - waiting to lock <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.mapred.JobInProgress.<init>(JobInProgress.java:130)
> at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:1383)
> - locked <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:336)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:559)
> "Timer-0":
> at org.apache.hadoop.mapred.JobTracker.getRunningJobs(JobTracker.java:943)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at org.apache.hadoop.mapred.JobTracker$JobTrackerMetrics.doUpdates(JobTracker.java:429)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.timerEvent(AbstractMetricsContext.java:275)
> - locked <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.access$000(AbstractMetricsContext.java:48)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext$1.run(AbstractMetricsContext.java:242)
> at java.util.TimerThread.mainLoop(Timer.java:512)
> at java.util.TimerThread.run(Timer.java:462)
> Found 1 deadlock.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Updated: (HADOOP-1140) Deadlock bug involving the
o.a.h.metrics package
Posted by "David Bowen (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-1140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Bowen updated HADOOP-1140:
--------------------------------
Status: Patch Available (was: Open)
> Deadlock bug involving the o.a.h.metrics package
> ------------------------------------------------
>
> Key: HADOOP-1140
> URL: https://issues.apache.org/jira/browse/HADOOP-1140
> Project: Hadoop
> Issue Type: Bug
> Reporter: David Bowen
> Assigned To: David Bowen
> Attachments: 1140.patch
>
>
> Hi David,
> Our nightly benchmarks are occasionally failing (2 to 4 of them per night) due to this deadlock in the JT that looks to be caused by Simon. Do you have time to fix this in the morning?
> Thanks,
> Nige
> Found one Java-level deadlock:
> =============================
> "expireLaunchingTasks":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> "IPC Server handler 8 on 50020":
> waiting to lock monitor 0x08141630 (object 0x57de46b8, a com.yahoo.simon.hadoop.metrics.SimonContext),
> which is held by "Timer-0"
> "Timer-0":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> Java stack information for the threads listed above:
> ===================================================
> "expireLaunchingTasks":
> at org.apache.hadoop.mapred.JobTracker$ExpireLaunchingTasks.run(JobTracker.java:152)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at java.lang.Thread.run(Thread.java:619)
> "IPC Server handler 8 on 50020":
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.createRecord(AbstractMetricsContext.java:192)
> - waiting to lock <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.mapred.JobInProgress.<init>(JobInProgress.java:130)
> at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:1383)
> - locked <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:336)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:559)
> "Timer-0":
> at org.apache.hadoop.mapred.JobTracker.getRunningJobs(JobTracker.java:943)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at org.apache.hadoop.mapred.JobTracker$JobTrackerMetrics.doUpdates(JobTracker.java:429)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.timerEvent(AbstractMetricsContext.java:275)
> - locked <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.access$000(AbstractMetricsContext.java:48)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext$1.run(AbstractMetricsContext.java:242)
> at java.util.TimerThread.mainLoop(Timer.java:512)
> at java.util.TimerThread.run(Timer.java:462)
> Found 1 deadlock.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Updated: (HADOOP-1140) Deadlock bug involving the
o.a.h.metrics package
Posted by "David Bowen (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-1140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Bowen updated HADOOP-1140:
--------------------------------
Attachment: 1140.patch
A simple fix in org.apache.hadoop.metrics.spi.AbstractMetricsContext. The context object was holding its own lock when calling back into application code. The fix is for it not to do that.
Note: I've also done some minor cleanups in this file - simply putting back the uses of Java 1.5 generic types that I was required to take out when I originally checked the code in because of the need at that time to support Java 1.4.
> Deadlock bug involving the o.a.h.metrics package
> ------------------------------------------------
>
> Key: HADOOP-1140
> URL: https://issues.apache.org/jira/browse/HADOOP-1140
> Project: Hadoop
> Issue Type: Bug
> Reporter: David Bowen
> Assigned To: David Bowen
> Attachments: 1140.patch
>
>
> Hi David,
> Our nightly benchmarks are occasionally failing (2 to 4 of them per night) due to this deadlock in the JT that looks to be caused by Simon. Do you have time to fix this in the morning?
> Thanks,
> Nige
> Found one Java-level deadlock:
> =============================
> "expireLaunchingTasks":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> "IPC Server handler 8 on 50020":
> waiting to lock monitor 0x08141630 (object 0x57de46b8, a com.yahoo.simon.hadoop.metrics.SimonContext),
> which is held by "Timer-0"
> "Timer-0":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> Java stack information for the threads listed above:
> ===================================================
> "expireLaunchingTasks":
> at org.apache.hadoop.mapred.JobTracker$ExpireLaunchingTasks.run(JobTracker.java:152)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at java.lang.Thread.run(Thread.java:619)
> "IPC Server handler 8 on 50020":
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.createRecord(AbstractMetricsContext.java:192)
> - waiting to lock <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.mapred.JobInProgress.<init>(JobInProgress.java:130)
> at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:1383)
> - locked <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:336)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:559)
> "Timer-0":
> at org.apache.hadoop.mapred.JobTracker.getRunningJobs(JobTracker.java:943)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at org.apache.hadoop.mapred.JobTracker$JobTrackerMetrics.doUpdates(JobTracker.java:429)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.timerEvent(AbstractMetricsContext.java:275)
> - locked <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.access$000(AbstractMetricsContext.java:48)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext$1.run(AbstractMetricsContext.java:242)
> at java.util.TimerThread.mainLoop(Timer.java:512)
> at java.util.TimerThread.run(Timer.java:462)
> Found 1 deadlock.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Updated: (HADOOP-1140) Deadlock bug involving the
o.a.h.metrics package
Posted by "Nigel Daley (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HADOOP-1140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Nigel Daley updated HADOOP-1140:
--------------------------------
Component/s: metrics
Fix Version/s: 0.12.2
Affects Version/s: 0.12.1
> Deadlock bug involving the o.a.h.metrics package
> ------------------------------------------------
>
> Key: HADOOP-1140
> URL: https://issues.apache.org/jira/browse/HADOOP-1140
> Project: Hadoop
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.12.1
> Reporter: David Bowen
> Assigned To: David Bowen
> Fix For: 0.12.2
>
> Attachments: 1140.patch
>
>
> Hi David,
> Our nightly benchmarks are occasionally failing (2 to 4 of them per night) due to this deadlock in the JT that looks to be caused by Simon. Do you have time to fix this in the morning?
> Thanks,
> Nige
> Found one Java-level deadlock:
> =============================
> "expireLaunchingTasks":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> "IPC Server handler 8 on 50020":
> waiting to lock monitor 0x08141630 (object 0x57de46b8, a com.yahoo.simon.hadoop.metrics.SimonContext),
> which is held by "Timer-0"
> "Timer-0":
> waiting to lock monitor 0x08141b44 (object 0x57eafdd0, a org.apache.hadoop.mapred.JobTracker),
> which is held by "IPC Server handler 8 on 50020"
> Java stack information for the threads listed above:
> ===================================================
> "expireLaunchingTasks":
> at org.apache.hadoop.mapred.JobTracker$ExpireLaunchingTasks.run(JobTracker.java:152)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at java.lang.Thread.run(Thread.java:619)
> "IPC Server handler 8 on 50020":
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.createRecord(AbstractMetricsContext.java:192)
> - waiting to lock <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.mapred.JobInProgress.<init>(JobInProgress.java:130)
> at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:1383)
> - locked <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:336)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:559)
> "Timer-0":
> at org.apache.hadoop.mapred.JobTracker.getRunningJobs(JobTracker.java:943)
> - waiting to lock <0x57eafdd0> (a org.apache.hadoop.mapred.JobTracker)
> at org.apache.hadoop.mapred.JobTracker$JobTrackerMetrics.doUpdates(JobTracker.java:429)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.timerEvent(AbstractMetricsContext.java:275)
> - locked <0x57de46b8> (a com.yahoo.simon.hadoop.metrics.SimonContext)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext.access$000(AbstractMetricsContext.java:48)
> at org.apache.hadoop.metrics.spi.AbstractMetricsContext$1.run(AbstractMetricsContext.java:242)
> at java.util.TimerThread.mainLoop(Timer.java:512)
> at java.util.TimerThread.run(Timer.java:462)
> Found 1 deadlock.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.