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Posted to issues@hbase.apache.org by "Jimmy Xiang (JIRA)" <ji...@apache.org> on 2012/11/03 01:18:12 UTC
[jira] [Created] (HBASE-7092) RegionServer OOM with jdk 1.7 related
to ConcurrentHashMap class loader
Jimmy Xiang created HBASE-7092:
----------------------------------
Summary: RegionServer OOM with jdk 1.7 related to ConcurrentHashMap class loader
Key: HBASE-7092
URL: https://issues.apache.org/jira/browse/HBASE-7092
Project: HBase
Issue Type: Sub-task
Reporter: Jimmy Xiang
One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
Keywords
sun.misc.Launcher$AppClassLoader @ 0x703994668
java.util.concurrent.ConcurrentHashMap
java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Updated] (HBASE-7092) RegionServer OOM with jdk 1.7 related
to ConcurrentHashMap class loader
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jimmy Xiang updated HBASE-7092:
-------------------------------
Attachment: heap-dump.png
> RegionServer OOM with jdk 1.7 related to ConcurrentHashMap class loader
> -----------------------------------------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Commented] (HBASE-7092) RegionServer OOM with jdk 1.7
related to ConcurrentHashMap class loader
Posted by "stack (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13489908#comment-13489908 ]
stack commented on HBASE-7092:
------------------------------
You have a heap dump Jimmy that we could take a look at ? What jdk1.7 version?
> RegionServer OOM with jdk 1.7 related to ConcurrentHashMap class loader
> -----------------------------------------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Updated] (HBASE-7092) RegionServer OOM related to
onlineregions
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jimmy Xiang updated HBASE-7092:
-------------------------------
Priority: Blocker (was: Major)
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Blocker
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Commented] (HBASE-7092) RegionServer OOM related to
onlineregions
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13490915#comment-13490915 ]
Jimmy Xiang commented on HBASE-7092:
------------------------------------
Actually, it is not block cache. It is memstore buffer.
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Blocker
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Updated] (HBASE-7092) RegionServer OOM with jdk 1.7 related
to ConcurrentHashMap class loader
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jimmy Xiang updated HBASE-7092:
-------------------------------
Issue Type: Bug (was: Sub-task)
Parent: (was: HBASE-6182)
> RegionServer OOM with jdk 1.7 related to ConcurrentHashMap class loader
> -----------------------------------------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Commented] (HBASE-7092) RegionServer OOM related to
onlineregions
Posted by "stack (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491712#comment-13491712 ]
stack commented on HBASE-7092:
------------------------------
How many regions per server? 4G or RAM? I should add a note to important configs. in refguide Jimmy? In 0.96 slab is on by default.
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Blocker
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Commented] (HBASE-7092) RegionServer OOM with jdk 1.7
related to ConcurrentHashMap class loader
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13489866#comment-13489866 ]
Jimmy Xiang commented on HBASE-7092:
------------------------------------
Started a 4 nodes cluster with JDK1.7. Ran ycsb for a short time and all regionserver died due to OOM.
> RegionServer OOM with jdk 1.7 related to ConcurrentHashMap class loader
> -----------------------------------------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Commented] (HBASE-7092) RegionServer OOM with jdk 1.7
related to ConcurrentHashMap class loader
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13490202#comment-13490202 ]
Jimmy Xiang commented on HBASE-7092:
------------------------------------
I do have a heap dump which is more than 4GB. I am using 1.7_9. I will try 1.6 and see if I get the same issue so that I can find out it is really a jdk issue or a new code issue.
> RegionServer OOM with jdk 1.7 related to ConcurrentHashMap class loader
> -----------------------------------------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Resolved] (HBASE-7092) RegionServer OOM related to
onlineregions
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jimmy Xiang resolved HBASE-7092.
--------------------------------
Resolution: Invalid
Found out the root cause: I have too many regions in each region server. Each region allocates too much block cache.
So it is a configuration issue. Closed as Invalid.
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Blocker
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Updated] (HBASE-7092) RegionServer OOM related to
onlineregions
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jimmy Xiang updated HBASE-7092:
-------------------------------
Summary: RegionServer OOM related to onlineregions (was: RegionServer OOM with jdk 1.7 related to ConcurrentHashMap class loader)
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Commented] (HBASE-7092) RegionServer OOM related to
onlineregions
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491715#comment-13491715 ]
Jimmy Xiang commented on HBASE-7092:
------------------------------------
I have about 2600 regions per server, and just 4G max heap. Slab is on by default in hbase-default.xml, not the code.
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Blocker
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Assigned] (HBASE-7092) RegionServer OOM with jdk 1.7
related to ConcurrentHashMap class loader
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jimmy Xiang reassigned HBASE-7092:
----------------------------------
Assignee: Jimmy Xiang
> RegionServer OOM with jdk 1.7 related to ConcurrentHashMap class loader
> -----------------------------------------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Commented] (HBASE-7092) RegionServer OOM related to
onlineregions
Posted by "stack (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491786#comment-13491786 ]
stack commented on HBASE-7092:
------------------------------
I added a note to the MSLAB section that lots of regions could cause you OOME (MSLAB is on since 0.92, not 0.96 as I said above)
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Blocker
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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[jira] [Commented] (HBASE-7092) RegionServer OOM related to
onlineregions
Posted by "Jimmy Xiang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13490810#comment-13490810 ]
Jimmy Xiang commented on HBASE-7092:
------------------------------------
I got the same issue with jdk 1.6. So it is not a jdk issue. Uploaded the head-dump image shows it may related to onlineregions.
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
> Key: HBASE-7092
> URL: https://issues.apache.org/jira/browse/HBASE-7092
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
> Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]
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