[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15902094#comment-15902094
]
Hudson commented on HBASE-17718:
FAILURE: Integrated in Jenkins build HBase-1.4 #661 (See
[https://builds.apache.org/job/HBase-1.4/661/])
HBASE-17718 Difference between RS's servername and its ephemeral node (stack:
rev ca5b8a44a490143536625502d5d88918f338f562)
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRSKilledWhenInitializing.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestServerCrashProcedure.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerListener.java
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/zookeeper/DrainingServerTracker.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureEvents.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestAssignmentListener.java
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Fix For: 2.0.0, 1.4.0
>
> Attachments: 0001-HBASE-17718-amendment.patch,
> HBASE-17718.branch-1.001.patch, HBASE-17718.branch-1.002.patch,
> HBASE-17718.branch-1.003.patch, HBASE-17718.master.001.patch,
> HBASE-17718.master.002.patch, HBASE-17718.master.003.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
--
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15901952#comment-15901952
]
Hudson commented on HBASE-17718:
SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #2636 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/2636/])
HBASE-17718 Difference between RS's servername and its ephemeral node (stack:
rev 6a57050c24100438508199c9856b95be7024803a)
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerListener.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRSKilledWhenInitializing.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/zookeeper/DrainingServerTracker.java
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Fix For: 2.0.0, 1.4.0
>
> Attachments: 0001-HBASE-17718-amendment.patch,
> HBASE-17718.branch-1.001.patch, HBASE-17718.branch-1.002.patch,
> HBASE-17718.branch-1.003.patch, HBASE-17718.master.001.patch,
> HBASE-17718.master.002.patch, HBASE-17718.master.003.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
--
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15901724#comment-15901724
]
Hadoop QA commented on HBASE-17718:
---
| (x) *{color:red}-1 overall{color}* |
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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} |
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\\
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:e01ee2f |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12856830/HBASE-17718.branch-1.003.patch
|
| JIRA Issue | HBASE-17718 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux bc67b739598a 3.13.0-106-generic #153-Ubuntu SMP Tue Dec 6
15:44:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/hbase.sh |
| git revision | branch-1 / f34709e |
| Default Java | 1.7.0_80 |
| Multi-JDK
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15901498#comment-15901498
]
stack commented on HBASE-17718:
---
Pushed the amendment. Here comes new branch-1 patch that includes the master
amendment (Test is pretty different since master and branch-1 profiles are so
different -- master carrying hbase:meta messes us up).
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments: 0001-HBASE-17718-amendment.patch,
> HBASE-17718.branch-1.001.patch, HBASE-17718.branch-1.002.patch,
> HBASE-17718.branch-1.003.patch, HBASE-17718.master.001.patch,
> HBASE-17718.master.002.patch, HBASE-17718.master.003.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
--
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(v6.3.15#6346)
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15901417#comment-15901417
]
Hadoop QA commented on HBASE-17718:
---
| (/) *{color:green}+1 overall{color}* |
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0s {color} | {color:green} Patch does not have any anti-patterns. {color} |
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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} 3m
20s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 37s
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26m 56s {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-alpha2. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
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\\
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:8d52d23 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12856805/0001-HBASE-17718-amendment.patch
|
| JIRA Issue | HBASE-17718 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux 173b0a91416a 3.13.0-106-generic #153-Ubuntu SMP Tue Dec 6
15:44:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
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|
| git revision | master / 58c7619 |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
| Test Results |
https://builds.apache.org/job/PreCommit-HBASE-Build/6007/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/6007/console |
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This message was automatically generated.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments:
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15900598#comment-15900598
]
Hadoop QA commented on HBASE-17718:
---
| (x) *{color:red}-1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
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14m 26s {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} |
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{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 113m 27s {color}
| {color:black} {color} |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:e01ee2f |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12856710/HBASE-17718.branch-1.002.patch
|
| JIRA Issue | HBASE-17718 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux afa629beddc0 4.4.0-43-generic #63-Ubuntu SMP Wed Oct 12
13:48:03 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/hbase.sh |
| git revision | branch-1 / 5f63093 |
| Default Java | 1.7.0_80 |
| Multi-JDK versions |
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15898452#comment-15898452
]
Hadoop QA commented on HBASE-17718:
---
| (x) *{color:red}-1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
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{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 3 new or modified test
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
23s {color} | {color:green} branch-1 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 43s
{color} | {color:green} branch-1 passed with JDK v1.8.0_121 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 43s
{color} | {color:green} branch-1 passed with JDK v1.7.0_80 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m
6s {color} | {color:green} branch-1 passed {color} |
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20s {color} | {color:green} branch-1 passed {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 2m 22s
{color} | {color:red} hbase-server in branch-1 has 2 extant Findbugs warnings.
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 30s
{color} | {color:green} branch-1 passed with JDK v1.8.0_121 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 38s
{color} | {color:green} branch-1 passed with JDK v1.7.0_80 {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
47s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 38s
{color} | {color:green} the patch passed with JDK v1.8.0_121 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 38s
{color} | {color:green} the patch passed {color} |
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{color} | {color:green} the patch passed with JDK v1.7.0_80 {color} |
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{color} | {color:green} the patch passed {color} |
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14m 52s {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} |
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20s {color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 120m 47s {color}
| {color:black} {color} |
\\
\\
|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.regionserver.TestRSKilledWhenInitializing |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:e01ee2f |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12856354/HBASE-17718.branch-1.001.patch
|
| JIRA Issue | HBASE-17718 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux 5903e64f5e01 3.13.0-106-generic #153-Ubuntu SMP Tue Dec 6
15:44:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/hbase.sh |
| git revision |
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15898440#comment-15898440
]
Hudson commented on HBASE-17718:
SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #2625 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/2625/])
HBASE-17718 Difference between RS's servername and its ephemeral node (stack:
rev 7fa7156f2cfbc6a5c9a50739d0ea4a3d5ce4c6ce)
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestMasterProcedureEvents.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRSKilledWhenInitializing.java
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestServerCrashProcedure.java
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments: HBASE-17718.branch-1.001.patch,
> HBASE-17718.master.001.patch, HBASE-17718.master.002.patch,
> HBASE-17718.master.003.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15898089#comment-15898089
]
Hadoop QA commented on HBASE-17718:
---
| (/) *{color:green}+1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 26s
{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 3 new or modified test
files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m
50s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 41s
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
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{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
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{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
52s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
16s {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}
31m 8s {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-alpha2. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m 4s
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{color} | {color:green} the patch passed {color} |
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19s {color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 152m 33s {color}
| {color:black} {color} |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:8d52d23 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12856326/HBASE-17718.master.003.patch
|
| JIRA Issue | HBASE-17718 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux 50a544df6f78 3.13.0-105-generic #152-Ubuntu SMP Fri Dec 2
15:37:11 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 / d2349c6 |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
| Test Results |
https://builds.apache.org/job/PreCommit-HBASE-Build/5968/testReport/ |
| modules | C: hbase-server U: hbase-server |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/5968/console |
| Powered by | Apache Yetus 0.3.0 http://yetus.apache.org |
This message was automatically generated.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments:
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15897764#comment-15897764
]
stack commented on HBASE-17718:
---
.003 includes fix for Jerry comment and fix for failing tests (added loads of
comments around how the wait on regionserver checkins is supposed to work... it
can get confusing... hopefully didn't make it more so).
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments: HBASE-17718.master.001.patch,
> HBASE-17718.master.002.patch, HBASE-17718.master.003.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15897535#comment-15897535
]
stack commented on HBASE-17718:
---
Thank you for review [~jerryhe]. Let me fix the rb comment and look at this
test too...
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments: HBASE-17718.master.001.patch,
> HBASE-17718.master.002.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
--
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15896022#comment-15896022
]
Jerry He commented on HBASE-17718:
--
LGTM on patch 002. Minor comment on RB.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments: HBASE-17718.master.001.patch,
> HBASE-17718.master.002.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
--
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15895992#comment-15895992
]
Hadoop QA commented on HBASE-17718:
---
| (x) *{color:red}-1 overall{color}* |
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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-alpha2. {color} |
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| {color:black} {color} |
\\
\\
|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.regionserver.TestRSKilledWhenInitializing |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:8d52d23 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12856077/HBASE-17718.master.002.patch
|
| JIRA Issue | HBASE-17718 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
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| uname | Linux 9bcb30be3104 3.13.0-106-generic #153-Ubuntu SMP Tue Dec 6
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| Build tool | maven |
| Personality |
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build@2/component/dev-support/hbase-personality.sh
|
| git revision | master / 6bb5938 |
| Default Java | 1.8.0_121 |
| findbugs | v3.0.0 |
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|
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> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15895905#comment-15895905
]
stack commented on HBASE-17718:
---
.002 fixes test failures. Patch exposed sloppyness in our accounting around
Master startup waiting on regions to report-in. We were passing out the wait
threshold early but before-the-patch, things would 'work' because of early
registration by RS up in zk. Now fix math so if a Master that only hosts
hbase:meta region, add one so we wait on a RS to checkin to which we can assign
user-space regions.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments: HBASE-17718.master.001.patch,
> HBASE-17718.master.002.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
--
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15895628#comment-15895628
]
Hadoop QA commented on HBASE-17718:
---
| (x) *{color:red}-1 overall{color}* |
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apply --whitespace=fix. {color} |
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28m 7s {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-alpha2. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 1m
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| {color:black}{color} | {color:black} {color} | {color:black} 148m 25s {color}
| {color:black} {color} |
\\
\\
|| Reason || Tests ||
| Failed junit tests | hadoop.hbase.regionserver.TestEncryptionKeyRotation |
| Timed out junit tests |
org.apache.hadoop.hbase.master.TestMasterOperationsForRegionReplicas |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:8d52d23 |
| JIRA Patch URL |
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|
| JIRA Issue | HBASE-17718 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile |
| uname | Linux 6f3b90262e99 3.13.0-106-generic #153-Ubuntu SMP Tue Dec 6
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|
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|
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| modules | C: hbase-server U: hbase-server |
| Console output |
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15895590#comment-15895590
]
stack commented on HBASE-17718:
---
First cut at a patch. Reverts the fix for the problem reported over in
HBASE-9593 and instead addresses the reported issue with a check for ephemeral
znode on ConnectionException when trying to open a region; if none found we
clean up the bad online server.
This is simple.
Alternatives such as having a provisional state in the Master where on receipt
of a confirming heartbeat or a check on zk state looking for a corresponding
ephemeral znode for the reporting regionserver and then moving the state from
provisionally registered to actually registered were all messy. They also take
us away from actual fix which is HBASE-17733.
Lets see how this patch does. branch-1 will be a bit different.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
> Attachments: HBASE-17718.master.001.patch
>
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15893823#comment-15893823
]
stack commented on HBASE-17718:
---
Looking at this now [~allan163]. Yes, revert of HBASE-9593. In the old days,
there was all kinds of mess possible when RS and Master did not agree on naming
so we just let master be in charge of how servers are named in a cluster.
HBASE-9593 mangled this. HBASE-13753 was supposed to fix it but was just left
sit.
But I'd like to put in place an alternate solution for the problem reported by
HBASE-9593. It is a real possibility. The heartbeat registers the server but we
need the evaporation of the znode for the server to be removed from online list
-- and if we fail to write the znode post the heartbeat that reports-for-duty,
the removal never happens (My 'There is also something odd...' is actually
incorrect on reexamination).
I'll be backHBASE-9593 has a nice test that I can reuse.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15893694#comment-15893694
]
Allan Yang commented on HBASE-17718:
So you suggest we revert HBASE-9593, [~stack]? If so, please go ahead and help
me resolve this issue. Thank you, sir!
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15893632#comment-15893632
]
stack commented on HBASE-17718:
---
#1 because HBASE-9593 is wrong (registering in zk with local name rather than
master-provided name BEFORE we've talked to the master to get what our cluster
name is supposed to be).
There is also something odd about HBASE-9593 looking at it now again. A
regionserver is being 'registered' via a reading of the zk data, not via
heartbeat so it must be something like a master that has joined a cluster that
is already up after a master crash. It looks like an extremely rare case where
an ephemeral node has not evaporated yet and in the meantime a master crashes
and then a backup master joins the cluster. Looks like we need a more rigorous
accounting of cluster servers when a backup master joins a running cluster. It
can read candidate servers by looking in zk but it should wait on a heartbeat
before adding a candidate regionserver to its cluster set. We can open a new
issue to do this so we prevent a version of HBASE-9593 arising again post
revert.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15893574#comment-15893574
]
stack commented on HBASE-17718:
---
We should not be using the local name. We need to use the name the master tells
us to use. Writing zk with local name is an error. Even if it there for a blink
of an eye, the master might notice and get confused thinking it a legit server.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
> 4.correct the zk node if master return another name( idea from Ted Yu)
>
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15893526#comment-15893526
]
Allan Yang commented on HBASE-17718:
{quote}
Another option is for region server to correct the server name in znode.
This can be done via zookeeper multi: drop previous znode and create new znode
in one call.
{quote}
It is also a good choice, but I afraid delete the old one will trigger a server
shutdown handling event, and the old servername will show as dead server in
master's web until restart.
But I will put this one as 4th solution. Let's vote on those solutions, so I
can prepare a patch.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
>
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15892046#comment-15892046
]
Ted Yu commented on HBASE-17718:
Another option is for region server to correct the server name in znode.
This can be done via zookeeper multi: drop previous znode and create new znode
in one call.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
>
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15891801#comment-15891801
]
Allan Yang commented on HBASE-17718:
We observed this issue only recently, we don't have a good solution yet. The
solution we used to quickly eliminate the malfunction online is also making
sure that /etc/hosts is clean. And I also think we'd better solve this in the
code level rather than rely on env config.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
>
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[jira] [Commented] (HBASE-17718) Difference between RS's servername and its ephemeral node cause SSH stop working
[
https://issues.apache.org/jira/browse/HBASE-17718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15891796#comment-15891796
]
Yu Li commented on HBASE-17718:
---
We also observed similar issue online and our way to resolve it was making sure
no difference in /etc/hosts. But I agree that it's better to resolve it at code
level.
Before discussing which solution to choose, mind share which way you're using
online and why? Thanks.
> Difference between RS's servername and its ephemeral node cause SSH stop
> working
>
>
> Key: HBASE-17718
> URL: https://issues.apache.org/jira/browse/HBASE-17718
> Project: HBase
> Issue Type: Bug
>Affects Versions: 2.0.0, 1.2.4, 1.1.8
>Reporter: Allan Yang
>Assignee: Allan Yang
>
> After HBASE-9593, RS put up an ephemeral node in ZK before reporting for
> duty. But if the hosts config (/etc/hosts) is different between master and
> RS, RS's serverName can be different from the one stored the ephemeral zk
> node. The email metioned in HBASE-13753
> (http://mail-archives.apache.org/mod_mbox/hbase-user/201505.mbox/%3CCANZDn9ueFEEuZMx=pZdmtLsdGLyZz=rrm1N6EQvLswYc1z-H=g...@mail.gmail.com%3E)
> is exactly what happened in our production env.
> But what the email didn't point out is that the difference between serverName
> in RS and zk node can cause SSH stop to work. as we can see from the code in
> {{RegionServerTracker}}
> {code}
> @Override
> public void nodeDeleted(String path) {
> if (path.startsWith(watcher.rsZNode)) {
> String serverName = ZKUtil.getNodeName(path);
> LOG.info("RegionServer ephemeral node deleted, processing expiration ["
> +
> serverName + "]");
> ServerName sn = ServerName.parseServerName(serverName);
> if (!serverManager.isServerOnline(sn)) {
> LOG.warn(serverName.toString() + " is not online or isn't known to
> the master."+
> "The latter could be caused by a DNS misconfiguration.");
> return;
> }
> remove(sn);
> this.serverManager.expireServer(sn);
> }
> }
> {code}
> The server will not be processed by SSH/ServerCrashProcedure. The regions on
> this server will not been assigned again until master restart or failover.
> I know HBASE-9593 was to fix the issue if RS report to duty and crashed
> before it can put up a zk node. It is a very rare case(And controllable， just
> fix the bug making rs to crash). But The issue I metioned can happened more
> often(and uncontrollable, can't be fixed in HBase, due to DNS, hosts config,
> etc.) and have more severe consequence.
> So here I offer some solutions to discuss:
> 1. Revert HBASE-9593 from all branches, Andrew Purtell has reverted it in
> branch-0.98
> 2. Abort RS if master return a different name, otherwise SSH can't work
> properly
> 3. Master accepts whatever servername reported by RS and don't change it.
>
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