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https://issues.apache.org/jira/browse/HBASE-15871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15310034#comment-15310034
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Hadoop QA commented on HBASE-15871:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {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:red}-1{color} | {color:red} test4tests {color} | {color:red} 0m 0s
{color} | {color:red} The patch doesn't appear to include any new or modified
tests. Please justify why no new tests are needed for this patch. Also please
list what manual steps were performed to verify this patch. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m
20s {color} | {color:green} branch-1.1 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 33s
{color} | {color:green} branch-1.1 passed with JDK v1.8.0 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 30s
{color} | {color:green} branch-1.1 passed with JDK v1.7.0_79 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
21s {color} | {color:green} branch-1.1 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
15s {color} | {color:green} branch-1.1 passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 1m 43s
{color} | {color:red} hbase-server in branch-1.1 has 78 extant Findbugs
warnings. {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red} 0m 25s
{color} | {color:red} hbase-server in branch-1.1 failed with JDK v1.8.0.
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 30s
{color} | {color:green} branch-1.1 passed with JDK v1.7.0_79 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
36s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 34s
{color} | {color:green} the patch passed with JDK v1.8.0 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 34s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 32s
{color} | {color:green} the patch passed with JDK v1.7.0_79 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 31s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
21s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
14s {color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} whitespace {color} | {color:red} 0m 0s
{color} | {color:red} The patch has 4 line(s) that end in whitespace. Use git
apply --whitespace=fix. {color} |
| {color:red}-1{color} | {color:red} hadoopcheck {color} | {color:red} 9m 13s
{color} | {color:red} Patch causes 10 errors with Hadoop v2.6.3. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 0s
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} javadoc {color} | {color:red} 0m 25s
{color} | {color:red} hbase-server in the patch failed with JDK v1.8.0. {color}
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 31s
{color} | {color:green} the patch passed with JDK v1.7.0_79 {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 82m 56s {color}
| {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
21s {color} | {color:green} Patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 104m 59s {color}
| {color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.master.TestDistributedLogSplitting |
| | hadoop.hbase.regionserver.TestStore |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12807370/HBASE-15871.branch-1.1.001.patch
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| JIRA Issue | HBASE-15871 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux asf900.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
|
| git revision | branch-1.1 / 1dfde75 |
| Default Java | 1.7.0_79 |
| Multi-JDK versions | /home/jenkins/tools/java/jdk1.8.0:1.8.0
/usr/local/jenkins/java/jdk1.7.0_79:1.7.0_79 |
| findbugs | v3.0.0 |
| findbugs |
https://builds.apache.org/job/PreCommit-HBASE-Build/2075/artifact/patchprocess/branch-findbugs-hbase-server-warnings.html
|
| javadoc |
https://builds.apache.org/job/PreCommit-HBASE-Build/2075/artifact/patchprocess/branch-javadoc-hbase-server-jdk1.8.0.txt
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| whitespace |
https://builds.apache.org/job/PreCommit-HBASE-Build/2075/artifact/patchprocess/whitespace-eol.txt
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| javadoc |
https://builds.apache.org/job/PreCommit-HBASE-Build/2075/artifact/patchprocess/patch-javadoc-hbase-server-jdk1.8.0.txt
|
| unit |
https://builds.apache.org/job/PreCommit-HBASE-Build/2075/artifact/patchprocess/patch-unit-hbase-server.txt
|
| unit test logs |
https://builds.apache.org/job/PreCommit-HBASE-Build/2075/artifact/patchprocess/patch-unit-hbase-server.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HBASE-Build/2075/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/2075/console |
| Powered by | Apache Yetus 0.2.1 http://yetus.apache.org |
This message was automatically generated.
> Memstore flush doesn't finish because of backwardseek() in memstore scanner.
> ----------------------------------------------------------------------------
>
> Key: HBASE-15871
> URL: https://issues.apache.org/jira/browse/HBASE-15871
> Project: HBase
> Issue Type: Bug
> Components: Scanners
> Affects Versions: 1.1.2
> Reporter: Jeongdae Kim
> Fix For: 1.1.2
>
> Attachments: HBASE-15871.branch-1.1.001.patch,
> memstore_backwardSeek().PNG
>
>
> Sometimes in our production hbase cluster, it takes a long time to finish
> memstore flush.( for about more than 30 minutes)
> the reason is that a memstore flusher thread calls
> StoreScanner.updateReaders(), waits for acquiring a lock that store scanner
> holds in StoreScanner.next() and backwardseek() in memstore scanner runs for
> a long time.
> I think that this condition could occur in reverse scan by the following
> process.
> 1) create a reversed store scanner by requesting a reverse scan.
> 2) flush a memstore in the same HStore.
> 3) puts a lot of cells in memstore and memstore is almost full.
> 4) call the reverse scanner.next() and re-create all scanners in this store
> because all scanners was already closed by 2)'s flush() and backwardseek()
> with store's lastTop for all new scanners.
> 5) in this status, memstore is almost full by 2) and all cells in memstore
> have sequenceID greater than this scanner's readPoint because of 2)'s
> flush(). this condition causes searching all cells in memstore, and
> seekToPreviousRow() repeatly seach cells that are already searched if a row
> has one column. (described this in more detail in a attached file.)
> 6) flush a memstore again in the same HStore, and wait until 4-5) process
> finished, to update store files in the same HStore after flusing.
> I searched HBase jira. and found a similar issue. (HBASE-14497) but,
> HBASE-14497's fix can't solve this issue because that fix just changed
> recursive call to loop.(and already applied to our HBase version)
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