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Hadoop QA commented on HBASE-9902: ---------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12612543/HBASE-9902.patch against trunk revision . {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 3 new or modified tests. {color:green}+1 hadoop1.0{color}. The patch compiles against the hadoop 1.0 profile. {color:green}+1 hadoop2.0{color}. The patch compiles against the hadoop 2.0 profile. {color:red}-1 javadoc{color}. The javadoc tool appears to have generated 1 warning messages. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:red}-1 findbugs{color}. The patch appears to introduce 4 new Findbugs (version 1.3.9) 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:red}-1 site{color}. The patch appears to cause mvn site goal to fail. {color:red}-1 core tests{color}. The patch failed these unit tests: org.apache.hadoop.hbase.master.TestClockSkewDetection Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/7776//console This message is automatically generated. > Region Server is starting normally even if clock skew is more than default 30 > seconds(or any configured). -> Regionserver node time is greater than master > node time > -------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > Key: HBASE-9902 > URL: https://issues.apache.org/jira/browse/HBASE-9902 > Project: HBase > Issue Type: Bug > Components: master > Affects Versions: 0.94.11 > Reporter: Kashif J S > Fix For: 0.98.0, 0.96.1 > > Attachments: HBASE-9902.patch > > > When Region server's time is ahead of Master's time and the difference is > more than hbase.master.maxclockskew value, region server startup is not > failing with ClockOutOfSyncException. > This causes some abnormal behavior as detected by our Tests. > ServerManager.java#checkClockSkew > long skew = System.currentTimeMillis() - serverCurrentTime; > if (skew > maxSkew) { > String message = "Server " + serverName + " has been " + > "rejected; Reported time is too far out of sync with master. " + > "Time difference of " + skew + "ms > max allowed of " + maxSkew + > "ms"; > LOG.warn(message); > throw new ClockOutOfSyncException(message); > } > Above line results in negative value when Master's time is lesser than > region server time and " if (skew > maxSkew) " check fails to find the skew > in this case. > Please Note: This was tested in hbase 0.94.11 version and the trunk also > currently has the same logic. > The fix for the same would be to make the skew positive value first as below: > long skew = System.currentTimeMillis() - serverCurrentTime; > skew = (skew < 0 ? -skew : skew); > if (skew > maxSkew) {..... -- This message was sent by Atlassian JIRA (v6.1#6144)