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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14498) Master stuck in infinite loop when all Zookeeper servers are unreachable
Date Thu, 17 Aug 2017 21:15:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16131323#comment-16131323
] 

Hadoop QA commented on HBASE-14498:
-----------------------------------

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 20m 28s{color} | {color:blue}
Docker mode activated. {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:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 37s{color} | {color:blue}
Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  3m 53s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  8s{color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 58s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 28s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m 39s{color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 56s{color} |
{color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue}  0m 17s{color} | {color:blue}
Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m  7s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 59s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 59s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 51s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green}  0m 26s{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 1 line(s) that end in whitespace. Use git apply --whitespace=fix <<patch_file>>.
Refer https://git-scm.com/docs/git-apply {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 34m 53s{color}
| {color:green} Patch does not cause any errors with Hadoop 2.6.1 2.6.2 2.6.3 2.6.4 2.6.5
2.7.1 2.7.2 2.7.3 or 3.0.0-alpha4. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  5m 14s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 53s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  2m 49s{color} | {color:green}
hbase-client in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}141m 15s{color} | {color:green}
hbase-server in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 31s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black}222m 58s{color} | {color:black}
{color} |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.0 Server=1.12.0 Image:yetus/hbase:bdc94b1 |
| JIRA Issue | HBASE-14498 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12882305/HBASE-14498.master.002.patch
|
| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  hbaseanti  checkstyle
 compile  |
| uname | Linux 15bb17da6617 3.13.0-123-generic #172-Ubuntu SMP Mon Jun 26 18:04:35 UTC 2017
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 / 75a6b36 |
| Default Java | 1.8.0_144 |
| findbugs | v3.1.0-RC3 |
| whitespace | https://builds.apache.org/job/PreCommit-HBASE-Build/8135/artifact/patchprocess/whitespace-eol.txt
|
|  Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/8135/testReport/ |
| modules | C: hbase-client hbase-server U: . |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/8135/console |
| Powered by | Apache Yetus 0.4.0   http://yetus.apache.org |


This message was automatically generated.



> Master stuck in infinite loop when all Zookeeper servers are unreachable
> ------------------------------------------------------------------------
>
>                 Key: HBASE-14498
>                 URL: https://issues.apache.org/jira/browse/HBASE-14498
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: Y. SREENIVASULU REDDY
>            Assignee: Pankaj Kumar
>            Priority: Critical
>             Fix For: 2.0.0
>
>         Attachments: HBASE-14498.master.001.patch, HBASE-14498.master.002.patch, HBASE-14498.patch,
HBASE-14498-V2.patch, HBASE-14498-V3.patch, HBASE-14498-V4.patch, HBASE-14498-V5.patch, HBASE-14498-V6.patch,
HBASE-14498-V6.patch
>
>
> We met a weird scenario in our production environment.
> In a HA cluster,
> > Active Master (HM1) is not able to connect to any Zookeeper server (due to N/w breakdown
on master machine network with Zookeeper servers).
> {code}
> 2015-09-26 15:24:47,508 INFO [HM1-Host:16000.activeMasterManager-SendThread(ZK-Host:2181)]
zookeeper.ClientCnxn: Client session timed out, have not heard from server in 33463ms for
sessionid 0x104576b8dda0002, closing socket connection and attempting reconnect
> 2015-09-26 15:24:47,877 INFO [HM1-Host:16000.activeMasterManager-SendThread(ZK-Host1:2181)]
client.FourLetterWordMain: connecting to ZK-Host1 2181
> 2015-09-26 15:24:48,236 INFO [main-SendThread(ZK-Host1:2181)] client.FourLetterWordMain:
connecting to ZK-Host1 2181
> 2015-09-26 15:24:49,879 WARN [HM1-Host:16000.activeMasterManager-SendThread(ZK-Host1:2181)]
zookeeper.ClientCnxn: Can not get the principle name from server ZK-Host1
> 2015-09-26 15:24:49,879 INFO [HM1-Host:16000.activeMasterManager-SendThread(ZK-Host1:2181)]
zookeeper.ClientCnxn: Opening socket connection to server ZK-Host1/ZK-IP1:2181. Will not attempt
to authenticate using SASL (unknown error)
> 2015-09-26 15:24:50,238 WARN [main-SendThread(ZK-Host1:2181)] zookeeper.ClientCnxn: Can
not get the principle name from server ZK-Host1
> 2015-09-26 15:24:50,238 INFO [main-SendThread(ZK-Host1:2181)] zookeeper.ClientCnxn: Opening
socket connection to server ZK-Host1/ZK-Host1:2181. Will not attempt to authenticate using
SASL (unknown error)
> 2015-09-26 15:25:17,470 INFO [main-SendThread(ZK-Host1:2181)] zookeeper.ClientCnxn: Client
session timed out, have not heard from server in 30023ms for sessionid 0x2045762cc710006,
closing socket connection and attempting reconnect
> 2015-09-26 15:25:17,571 WARN [master/HM1-Host/HM1-IP:16000] zookeeper.RecoverableZooKeeper:
Possibly transient ZooKeeper, quorum=ZK-Host:2181,ZK-Host1:2181,ZK-Host2:2181, exception=org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase/master
> 2015-09-26 15:25:17,872 INFO [main-SendThread(ZK-Host:2181)] client.FourLetterWordMain:
connecting to ZK-Host 2181
> 2015-09-26 15:25:19,874 WARN [main-SendThread(ZK-Host:2181)] zookeeper.ClientCnxn: Can
not get the principle name from server ZK-Host
> 2015-09-26 15:25:19,874 INFO [main-SendThread(ZK-Host:2181)] zookeeper.ClientCnxn: Opening
socket connection to server ZK-Host/ZK-IP:2181. Will not attempt to authenticate using SASL
(unknown error)
> {code}
> > Since HM1 was not able to connect to any ZK, so session timeout didnt happen at
Zookeeper server side and HM1 didnt abort.
> > On Zookeeper session timeout standby master (HM2) registered himself as an active
master. 
> > HM2 is keep on waiting for region server to report him as part of active master
intialization.
> {noformat} 
> 2015-09-26 15:24:44,928 | INFO | HM2-Host:21300.activeMasterManager | Waiting for region
servers count to settle; currently checked in 0, slept for 0 ms, expecting minimum of 1, maximum
of 2147483647, timeout of 4500 ms, interval of 1500 ms. | org.apache.hadoop.hbase.master.ServerManager.waitForRegionServers(ServerManager.java:1011)
> ---
> ---
> 2015-09-26 15:32:50,841 | INFO | HM2-Host:21300.activeMasterManager | Waiting for region
servers count to settle; currently checked in 0, slept for 483913 ms, expecting minimum of
1, maximum of 2147483647, timeout of 4500 ms, interval of 1500 ms. | org.apache.hadoop.hbase.master.ServerManager.waitForRegionServers(ServerManager.java:1011)
> {noformat}
> > At other end, region servers are reporting to HM1 on 3 sec interval. Here region
server retrieve master location from zookeeper only when they couldn't connect to Master (ServiceException).
> Region Server will not report HM2 as per current design until unless HM1 abort,so HM2
will exit(InitializationMonitor) and again wait for region servers in loop.



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