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https://issues.apache.org/jira/browse/HBASE-18137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16043896#comment-16043896
 ] 

Hadoop QA commented on HBASE-18137:
-----------------------------------

| (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 33s 
{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 2 new or modified test 
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m 
16s {color} | {color:green} branch-1 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 8s 
{color} | {color:green} branch-1 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 
34s {color} | {color:green} branch-1 passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
23s {color} | {color:green} branch-1 passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 3m 48s 
{color} | {color:red} hbase-server in branch-1 has 1 extant Findbugs warnings. 
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 50s 
{color} | {color:green} branch-1 passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 
16s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 6s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 6s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 
33s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m 
25s {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} 
30m 31s {color} | {color:green} The 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 
23s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 4m 9s 
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 48s 
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 191m 47s 
{color} | {color:red} hbase-server in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 
29s {color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 244m 42s {color} 
| {color:black} {color} |
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|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.master.balancer.TestStochasticLoadBalancer2 
|
|   | hadoop.hbase.regionserver.TestPerColumnFamilyFlush |
|   | hadoop.hbase.master.TestMasterBalanceThrottling |
| Timed out junit tests | 
org.apache.hadoop.hbase.replication.regionserver.TestWALEntryStream |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.03.0-ce Server=17.03.0-ce Image:yetus/hbase:395d9a0 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12872172/HBASE-18137.branch-1.v1.patch
 |
| JIRA Issue | HBASE-18137 |
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  
hbaseanti  checkstyle  compile  |
| uname | Linux 0c34c97b8321 4.8.3-std-1 #1 SMP Fri Oct 21 11:15:43 UTC 2016 
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/hbase.sh |
| git revision | branch-1 / ba3a816 |
| Default Java | 1.8.0_131 |
| findbugs | v3.0.0 |
| findbugs | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7151/artifact/patchprocess/branch-findbugs-hbase-server-warnings.html
 |
| unit | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7151/artifact/patchprocess/patch-unit-hbase-server.txt
 |
| unit test logs |  
https://builds.apache.org/job/PreCommit-HBASE-Build/7151/artifact/patchprocess/patch-unit-hbase-server.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7151/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/7151/console |
| Powered by | Apache Yetus 0.3.0   http://yetus.apache.org |


This message was automatically generated.



> Replication gets stuck for empty WALs
> -------------------------------------
>
>                 Key: HBASE-18137
>                 URL: https://issues.apache.org/jira/browse/HBASE-18137
>             Project: HBase
>          Issue Type: Bug
>          Components: Replication
>    Affects Versions: 1.3.1
>            Reporter: Ashu Pachauri
>            Assignee: Vincent Poon
>            Priority: Critical
>             Fix For: 2.0.0, 1.4.0, 1.3.2, 1.1.11, 1.2.7
>
>         Attachments: HBASE-18137.branch-1.3.v1.patch, 
> HBASE-18137.branch-1.3.v2.patch, HBASE-18137.branch-1.3.v3.patch, 
> HBASE-18137.branch-1.v1.patch
>
>
> Replication assumes that only the last WAL of a recovered queue can be empty. 
> But, intermittent DFS issues may cause empty WALs being created (without the 
> PWAL magic), and a roll of WAL to happen without a regionserver crash. This 
> will cause recovered queues to have empty WALs in the middle. This cause 
> replication to get stuck:
> {code}
> TRACE regionserver.ReplicationSource: Opening log <wal_file>
> WARN regionserver.ReplicationSource: <peer_cluster_id>-<recovered_queue> Got: 
> java.io.EOFException
>       at java.io.DataInputStream.readFully(DataInputStream.java:197)
>       at java.io.DataInputStream.readFully(DataInputStream.java:169)
>       at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1915)
>       at 
> org.apache.hadoop.io.SequenceFile$Reader.initialize(SequenceFile.java:1880)
>       at 
> org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1829)
>       at 
> org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1843)
>       at 
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader.<init>(SequenceFileLogReader.java:70)
>       at 
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.reset(SequenceFileLogReader.java:168)
>       at 
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.initReader(SequenceFileLogReader.java:177)
>       at 
> org.apache.hadoop.hbase.regionserver.wal.ReaderBase.init(ReaderBase.java:66)
>       at 
> org.apache.hadoop.hbase.wal.WALFactory.createReader(WALFactory.java:312)
>       at 
> org.apache.hadoop.hbase.wal.WALFactory.createReader(WALFactory.java:276)
>       at 
> org.apache.hadoop.hbase.wal.WALFactory.createReader(WALFactory.java:264)
>       at 
> org.apache.hadoop.hbase.wal.WALFactory.createReader(WALFactory.java:423)
>       at 
> org.apache.hadoop.hbase.replication.regionserver.ReplicationWALReaderManager.openReader(ReplicationWALReaderManager.java:70)
>       at 
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource$ReplicationSourceWorkerThread.openReader(ReplicationSource.java:830)
>       at 
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource$ReplicationSourceWorkerThread.run(ReplicationSource.java:572)
> {code}
> The WAL in question was completely empty but there were other WALs in the 
> recovered queue which were newer and non-empty.



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