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https://issues.apache.org/jira/browse/HBASE-12075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14166606#comment-14166606
]
Hadoop QA commented on HBASE-12075:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12674132/0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch
against trunk revision .
ATTACHMENT ID: 12674132
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 8 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: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:red}-1 lineLengths{color}. The patch introduces the following lines
longer than 100:
+ public void testPreemptiveFastFailException20Times() throws
InterruptedException, ExecutionException {
+ priviCallerNew.callWithRetries(getRetryingCallable(serverName, null,
true), CLEANUP_TIMEOUT);
+ Thread.sleep(10); // Sleep a ms so that we don't outrun the
priviThread. Hope its enough. Fingers crossed
{color:green}+1 site{color}. The mvn site goal succeeds with this patch.
{color:red}-1 core tests{color}. The patch failed these unit tests:
org.apache.hadoop.hbase.TestJMXListener
{color:red}-1 core zombie tests{color}. There are 1 zombie test(s):
at
org.apache.hadoop.hbase.master.TestMasterNoCluster.testNotPullingDeadRegionServerFromZK(TestMasterNoCluster.java:306)
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//artifact/patchprocess/newPatchFindbugsWarningshbase-annotations.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/11301//console
This message is automatically generated.
> Preemptive Fast Fail
> --------------------
>
> Key: HBASE-12075
> URL: https://issues.apache.org/jira/browse/HBASE-12075
> Project: HBase
> Issue Type: Sub-task
> Components: Client
> Affects Versions: 0.99.0, 2.0.0, 0.98.6.1
> Reporter: Manukranth Kolloju
> Assignee: Manukranth Kolloju
> Attachments: 0001-Add-a-test-case-for-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-HBASE-12075-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch,
> 0001-Implement-Preemptive-Fast-Fail.patch
>
>
> In multi threaded clients, we use a feature developed on 0.89-fb branch
> called Preemptive Fast Fail. This allows the client threads which would
> potentially fail, fail fast. The idea behind this feature is that we allow,
> among the hundreds of client threads, one thread to try and establish
> connection with the regionserver and if that succeeds, we mark it as a live
> node again. Meanwhile, other threads which are trying to establish connection
> to the same server would ideally go into the timeouts which is effectively
> unfruitful. We can in those cases return appropriate exceptions to those
> clients instead of letting them retry.
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