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https://issues.apache.org/jira/browse/HBASE-12028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14257772#comment-14257772
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Hadoop QA commented on HBASE-12028:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12688941/hbase-12028-v5.patch
against master branch at commit 2b090d6832c944ea47f81e1b6db518a74c1149e0.
ATTACHMENT ID: 12688941
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 5 new
or modified tests.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:red}-1 checkstyle{color}. The applied patch generated
2091 checkstyle errors (more than the master's current 2082 errors).
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 lineLengths{color}. The patch does not introduce lines
longer than 100
{color:green}+1 site{color}. The mvn site goal succeeds with this patch.
{color:green}+1 core tests{color}. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-annotations.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-rest.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//artifact/patchprocess/checkstyle-aggregate.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/12216//console
This message is automatically generated.
> Abort the RegionServer, when one of it's handler threads die
> ------------------------------------------------------------
>
> Key: HBASE-12028
> URL: https://issues.apache.org/jira/browse/HBASE-12028
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Reporter: Sudarshan Kadambi
> Assignee: Alicia Ying Shu
> Attachments: Hbase-12028-v3.patch, Hbase-12028.patch,
> hbase-12028-v4.patch, hbase-12028-v5.patch
>
>
> Over in HBase-11813, a user identified an issue where in all the RPC handler
> threads would exit with StackOverflow errors due to an unchecked
> recursion-terminating condition. Our clusters demonstrated the same trace.
> While the patch posted for HBASE-11813 got our clusters to be merry again,
> the breakdown surfaced some larger issues.
> When the RegionServer had all it's RPC handler threads dead, it continued to
> have regions assigned it. Clearly, it wouldn't be able to serve reads and
> writes on those regions. A second issue was that when a user tried to disable
> or drop a table, the master would try to communicate to the regionserver for
> region unassignment. Since the same handler threads seem to be used for
> master <-> RS communication as well, the master ended up hanging on the RS
> indefinitely. Eventually, the master stopped responding to all table
> meta-operations.
> A handler thread should never exit, and if it does, it seems like the more
> prudent thing to do would be for the RS to abort. This way, at least recovery
> can be undertaken and the regions could be reassigned elsewhere. I also think
> that the master<->RS communication should get its own exclusive threadpool,
> but I'll wait until this issue has been sufficiently discussed before opening
> an issue ticket for that.
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