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Hadoop QA commented on HBASE-19358: ----------------------------------- | (/) *{color:green}+1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || | {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 10s{color} | {color:blue} Docker mode activated. {color} | || || || || {color:brown} Prechecks {color} || | {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 0m 1s{color} | {color:blue} Findbugs executables are not available. {color} | | {color:green}+1{color} | {color:green} hbaseanti {color} | {color:green} 0m 0s{color} | {color:green} Patch does not have any anti-patterns. {color} | | {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s{color} | {color:green} The patch does not contain any @author tags. {color} | | {color:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m 0s{color} | {color:green} The patch appears to include 2 new or modified test files. {color} | || || || || {color:brown} master Compile Tests {color} || | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 4m 43s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 46s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 6s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} shadedjars {color} | {color:green} 5m 49s{color} | {color:green} branch has no errors when building our shaded downstream artifacts. {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 33s{color} | {color:green} master passed {color} | || || || || {color:brown} Patch Compile Tests {color} || | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 4m 45s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 42s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 42s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 5s{color} | {color:green} hbase-server: The patch generated 0 new + 48 unchanged - 3 fixed = 48 total (was 51) {color} | | {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 0s{color} | {color:green} The patch has no whitespace issues. {color} | | {color:green}+1{color} | {color:green} shadedjars {color} | {color:green} 4m 40s{color} | {color:green} patch has no errors when building our shaded downstream artifacts. {color} | | {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 20m 14s{color} | {color:green} Patch does not cause any errors with Hadoop 2.6.5 2.7.4 or 3.0.0. {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 29s{color} | {color:green} the patch passed {color} | || || || || {color:brown} Other Tests {color} || | {color:green}+1{color} | {color:green} unit {color} | {color:green}113m 38s{color} | {color:green} hbase-server in the patch passed. {color} | | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 18s{color} | {color:green} The patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black}153m 27s{color} | {color:black} {color} | \\ \\ || Subsystem || Report/Notes || | Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hbase:eee3b01 | | JIRA Issue | HBASE-19358 | | JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12904163/HBASE-19358-v8.patch | | Optional Tests | asflicense javac javadoc unit findbugs shadedjars hadoopcheck hbaseanti checkstyle compile | | uname | Linux 56784256c67e 3.13.0-133-generic #182-Ubuntu SMP Tue Sep 19 15:49:21 UTC 2017 x86_64 GNU/Linux | | Build tool | maven | | Personality | /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build@2/component/dev-support/hbase-personality.sh | | git revision | master / 6708d54478 | | maven | version: Apache Maven 3.5.2 (138edd61fd100ec658bfa2d307c43b76940a5d7d; 2017-10-18T07:58:13Z) | | Default Java | 1.8.0_151 | | Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/10838/testReport/ | | modules | C: hbase-server U: hbase-server | | Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/10838/console | | Powered by | Apache Yetus 0.6.0 http://yetus.apache.org | This message was automatically generated. > Improve the stability of splitting log when do fail over > -------------------------------------------------------- > > Key: HBASE-19358 > URL: https://issues.apache.org/jira/browse/HBASE-19358 > Project: HBase > Issue Type: Improvement > Components: MTTR > Affects Versions: 0.98.24 > Reporter: Jingyun Tian > Assignee: Jingyun Tian > Attachments: HBASE-18619-branch-2-v2.patch, > HBASE-18619-branch-2.patch, HBASE-19358-branch-1-v2.patch, > HBASE-19358-branch-1-v3.patch, HBASE-19358-branch-1.patch, > HBASE-19358-v1.patch, HBASE-19358-v4.patch, HBASE-19358-v5.patch, > HBASE-19358-v6.patch, HBASE-19358-v7.patch, HBASE-19358-v8.patch, > HBASE-19358.patch > > > The way we splitting log now is like the following figure: > !https://issues.apache.org/jira/secure/attachment/12902997/split-logic-old.jpg! > The problem is the OutputSink will write the recovered edits during splitting > log, which means it will create one WriterAndPath for each region and retain > it until the end. If the cluster is small and the number of regions per rs is > large, it will create too many HDFS streams at the same time. Then it is > prone to failure since each datanode need to handle too many streams. > Thus I come up with a new way to split log. > !https://issues.apache.org/jira/secure/attachment/12902998/split-logic-new.jpg! > We try to cache all the recovered edits, but if it exceeds the MaxHeapUsage, > we will pick the largest EntryBuffer and write it to a file (close the writer > after finish). Then after we read all entries into memory, we will start a > writeAndCloseThreadPool, it starts a certain number of threads to write all > buffers to files. Thus it will not create HDFS streams more than > *_hbase.regionserver.hlog.splitlog.writer.threads_* we set. > The biggest benefit is we can control the number of streams we create during > splitting log, > it will not exceeds *_hbase.regionserver.wal.max.splitters * > hbase.regionserver.hlog.splitlog.writer.threads_*, but before it is > *_hbase.regionserver.wal.max.splitters * the number of region the hlog > contains_*. -- This message was sent by Atlassian JIRA (v6.4.14#64029)