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https://issues.apache.org/jira/browse/HBASE-15871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15529381#comment-15529381
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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:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 10s
{color} | {color:blue} Docker mode activated. {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 1 new or modified test
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
53s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 36s
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
45s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
13s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
40s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 27s
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
46s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 36s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 36s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
44s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
13s {color} | {color:green} the patch passed {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} hadoopcheck {color} | {color:green}
25m 44s {color} | {color:green} Patch does not cause any errors with Hadoop
2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.1 2.6.2 2.6.3 2.7.1. {color} |
| {color:green}+1{color} | {color:green} hbaseprotoc {color} | {color:green} 0m
12s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
51s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 26s
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 107m 49s
{color} | {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
13s {color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 145m 39s {color}
| {color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.client.TestBlockEvictionFromClient |
| | hadoop.hbase.master.procedure.TestMasterProcedureWalLease |
| Timed out junit tests |
org.apache.hadoop.hbase.snapshot.TestMobExportSnapshot |
| | org.apache.hadoop.hbase.snapshot.TestMobRestoreFlushSnapshotFromClient |
| | org.apache.hadoop.hbase.snapshot.TestRestoreFlushSnapshotFromClient |
| | org.apache.hadoop.hbase.snapshot.TestFlushSnapshotFromClient |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.11.2 Server=1.11.2 Image:yetus/hbase:7bda515 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12830656/HBASE-15871_6.patch |
| JIRA Issue | HBASE-15871 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux e4212b9c9cb3 3.13.0-95-generic #142-Ubuntu SMP Fri Aug 12
17:00:09 UTC 2016 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 | master / de7316b |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| unit |
https://builds.apache.org/job/PreCommit-HBASE-Build/3753/artifact/patchprocess/patch-unit-hbase-server.txt
|
| unit test logs |
https://builds.apache.org/job/PreCommit-HBASE-Build/3753/artifact/patchprocess/patch-unit-hbase-server.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HBASE-Build/3753/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/3753/console |
| Powered by | Apache Yetus 0.3.0 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
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0, 1.4.0
>
> Attachments: HBASE-15871-branch-1.patch,
> HBASE-15871.branch-1.1.001.patch, HBASE-15871.branch-1.1.002.patch,
> HBASE-15871.branch-1.1.003.patch, HBASE-15871.patch, HBASE-15871_1.patch,
> HBASE-15871_1.patch, HBASE-15871_2.patch, HBASE-15871_3.patch,
> HBASE-15871_4.patch, HBASE-15871_6.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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