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https://issues.apache.org/jira/browse/HBASE-21775?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16751730#comment-16751730
 ] 

Hadoop QA commented on HBASE-21775:
-----------------------------------

| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
16s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {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 1 new or modified test 
files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  5m 
27s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
45s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
42s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} shadedjars {color} | {color:green}  5m 
28s{color} | {color:green} branch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
15s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
26s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  5m 
23s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
44s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
44s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
38s{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} shadedjars {color} | {color:green}  5m 
12s{color} | {color:green} patch has no errors when building our shaded 
downstream artifacts. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 
10m 24s{color} | {color:green} Patch does not cause any errors with Hadoop 
2.7.4 or 3.0.0. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
23s{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:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  3m 
17s{color} | {color:green} hbase-client in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
11s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 42m 26s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hbase:b002b0b |
| JIRA Issue | HBASE-21775 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12956220/HBASE-21775.master.001.patch
 |
| Optional Tests |  dupname  asflicense  javac  javadoc  unit  findbugs  
shadedjars  hadoopcheck  hbaseanti  checkstyle  compile  |
| uname | Linux b60932886172 4.4.0-138-generic #164~14.04.1-Ubuntu SMP Fri Oct 
5 08:56:16 UTC 2018 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 / 416b70f461 |
| maven | version: Apache Maven 3.5.4 
(1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T18:33:14Z) |
| Default Java | 1.8.0_181 |
| findbugs | v3.1.0-RC3 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-HBASE-Build/15726/testReport/ |
| Max. process+thread count | 265 (vs. ulimit of 10000) |
| modules | C: hbase-client U: hbase-client |
| Console output | 
https://builds.apache.org/job/PreCommit-HBASE-Build/15726/console |
| Powered by | Apache Yetus 0.8.0   http://yetus.apache.org |


This message was automatically generated.



> The BufferedMutator doesn't ever refresh region location cache
> --------------------------------------------------------------
>
>                 Key: HBASE-21775
>                 URL: https://issues.apache.org/jira/browse/HBASE-21775
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>            Reporter: Tommy Li
>            Assignee: Tommy Li
>            Priority: Major
>             Fix For: 3.0.0
>
>         Attachments: HBASE-21775.master.001.patch
>
>
> {color:#222222}I noticed in some of my writing jobs that the BufferedMutator 
> would get stuck retrying writes against a dead server.{color}
> {code:java}
> 19/01/18 15:15:47 INFO [Executor task launch worker for task 0] 
> client.AsyncRequestFutureImpl: #2, waiting for 1  actions to finish on table: 
> dummy_table
> 19/01/18 15:15:54 WARN [htable-pool3-t56] client.AsyncRequestFutureImpl: 
> id=2, table=dummy_table, attempt=15/21, failureCount=1ops, last 
> exception=org.apache.hadoop.hbase.DoNotRetryIOException: Operation rpcTimeout 
> on <SERVER>,17020,1547848193782, tracking started Fri Jan 18 14:55:37 PST 
> 2019; NOT retrying, failed=1 -- final attempt!
> 19/01/18 15:15:54 ERROR [Executor task launch worker for task 0] 
> IngestRawData.map(): [B@258bc2c7: 
> org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 1 
> action: Operation rpcTimeout: 1 time, servers with issues: 
> <SERVER>,17020,1547848193782
> {code}
>  
> After the single remaining action permanently failed, it would resume 
> progress only to get stuck again retrying against the same dead server:
> {code:java}
> 19/01/18 15:21:18 INFO [Executor task launch worker for task 0] 
> client.AsyncRequestFutureImpl: #2, waiting for 1  actions to finish on table: 
> dummy_table
> 19/01/18 15:21:18 INFO [Executor task launch worker for task 0] 
> client.AsyncRequestFutureImpl: #2, waiting for 1  actions to finish on table: 
> dummy_table
> 19/01/18 15:21:20 INFO [htable-pool3-t55] client.AsyncRequestFutureImpl: 
> id=2, table=dummy_table, attempt=6/21, failureCount=1ops, last 
> exception=java.net.ConnectException: Call to <SERVER> failed on connection 
> exception: 
> org.apache.hbase.thirdparty.io.netty.channel.ConnectTimeoutException: 
> connection timed out: <SERVER> on <SERVER>,17020,1547848193782, tracking 
> started null, retrying after=20089ms, operationsToReplay=1
> {code}
>  
> Only restarting the client process to generate a new BufferedMutator instance 
> would fix the issue, at least until the next regionserver crash
>  The logs I've pasted show the issue happening with a 
> ConnectionTimeoutException, but we've also seen it with 
> NotServingRegionException and some others



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