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From "jiraposter@reviews.apache.org (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4014) Coprocessors: Flag the presence of coprocessors in logged exceptions
Date Mon, 01 Aug 2011 22:54:28 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13073981#comment-13073981
] 

jiraposter@reviews.apache.org commented on HBASE-4014:
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-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/969/#review1256
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src/main/java/org/apache/hadoop/hbase/master/MasterCoprocessorHost.java
<https://reviews.apache.org/r/969/#comment2887>

    Reading description of this JIRA, I don't see abortion as part of the requirement.
    Shall we introduce debug mode for coprocessors. When debug mode is enabled, we abort.


- Ted


On 2011-08-01 22:08:27, Eugene Koontz wrote:
bq.  
bq.  -----------------------------------------------------------
bq.  This is an automatically generated e-mail. To reply, visit:
bq.  https://reviews.apache.org/r/969/
bq.  -----------------------------------------------------------
bq.  
bq.  (Updated 2011-08-01 22:08:27)
bq.  
bq.  
bq.  Review request for hbase, Gary Helmling and Mingjie Lai.
bq.  
bq.  
bq.  Summary
bq.  -------
bq.  
bq.  https://issues.apache.org/jira/browse/HBASE-4014 Coprocessors: Flag the presence of coprocessors
in logged exceptions
bq.  
bq.  The general gist here is to wrap each of {Master,RegionServer}CoprocessorHost's coprocessor
call inside a 
bq.  
bq.  "try { ... } catch (Throwable e) { handleCoprocessorThrowable(e) }"
bq.  
bq.  block. 
bq.  
bq.  handleCoprocessorThrowable() is responsible for either passing 'e' along to the client
(if 'e' is an IOException) or, otherwise, aborting the service (Regionserver or Master).
bq.  
bq.  The abort message contains a list of the loaded coprocessors for crash analysis.
bq.  
bq.  
bq.  This addresses bug HBASE-4014.
bq.      https://issues.apache.org/jira/browse/HBASE-4014
bq.  
bq.  
bq.  Diffs
bq.  -----
bq.  
bq.    src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java 18ba6e7 
bq.    src/main/java/org/apache/hadoop/hbase/master/MasterCoprocessorHost.java aa930f5 
bq.    src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java c2b3558

bq.    src/test/java/org/apache/hadoop/hbase/coprocessor/BuggyRegionObserver.java PRE-CREATION

bq.    src/test/java/org/apache/hadoop/hbase/coprocessor/TestMasterCoprocessorException.java
PRE-CREATION 
bq.    src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionServerCoprocessorException.java
PRE-CREATION 
bq.  
bq.  Diff: https://reviews.apache.org/r/969/diff
bq.  
bq.  
bq.  Testing
bq.  -------
bq.  
bq.  patch includes two tests:
bq.  
bq.  TestMasterCoprocessorException.java
bq.  TestRegionServerCoprocessorException.java
bq.  
bq.  both tests pass in my build environment.
bq.  
bq.  
bq.  Thanks,
bq.  
bq.  Eugene
bq.  
bq.



> Coprocessors: Flag the presence of coprocessors in logged exceptions
> --------------------------------------------------------------------
>
>                 Key: HBASE-4014
>                 URL: https://issues.apache.org/jira/browse/HBASE-4014
>             Project: HBase
>          Issue Type: Improvement
>          Components: coprocessors
>            Reporter: Andrew Purtell
>            Assignee: Eugene Koontz
>             Fix For: 0.92.0
>
>         Attachments: HBASE-4014.patch, HBASE-4014.patch, HBASE-4014.patch, HBASE-4014.patch
>
>
> For some initial triage of bug reports for core versus for deployments with loaded coprocessors,
we need something like the Linux kernel's taint flag, and list of linked in modules that show
up in the output of every OOPS, to appear above or below exceptions that appear in the logs.

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