[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Resolution: Fixed
Status: Resolved (was: Patch Available)
Committed to 0.94.1 and 0.96.
Thanks to Rajesh for the patch.
Thanks Ted, Chunhui and Stack for the review.
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_0.94_2.patch, HBASE-5875_trunk.patch,
> HBASE-5875_trunk.patch, HBASE-5875_trunk_1.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Fix Version/s: 0.96.0
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.96.0, 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_0.94_2.patch, HBASE-5875_trunk.patch,
> HBASE-5875_trunk.patch, HBASE-5875_trunk_1.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Attachment: HBASE-5875_trunk_1.patch
Patch for trunk, ready for commit.
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_0.94_2.patch, HBASE-5875_trunk.patch,
> HBASE-5875_trunk.patch, HBASE-5875_trunk_1.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Attachment: HBASE-5875_0.94_2.patch
PAtch for 0.94 ready for commit.
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_0.94_2.patch, HBASE-5875_trunk.patch,
> HBASE-5875_trunk.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
rajeshbabu updated HBASE-5875:
--
Status: Patch Available (was: Open)
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_trunk.patch, HBASE-5875_trunk.patch,
> HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
rajeshbabu updated HBASE-5875:
--
Status: Open (was: Patch Available)
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_trunk.patch, HBASE-5875_trunk.patch,
> HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
rajeshbabu updated HBASE-5875:
--
Attachment: HBASE-5875_trunk.patch
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_trunk.patch, HBASE-5875_trunk.patch,
> HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
rajeshbabu updated HBASE-5875:
--
Status: Patch Available (was: Open)
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_trunk.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
rajeshbabu updated HBASE-5875:
--
Status: Open (was: Patch Available)
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_trunk.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
rajeshbabu updated HBASE-5875:
--
Attachment: HBASE-5875_trunk.patch
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_trunk.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
rajeshbabu updated HBASE-5875:
--
Status: Open (was: Patch Available)
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_trunk.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
rajeshbabu updated HBASE-5875:
--
Status: Patch Available (was: Open)
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875_trunk.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhihong Yu updated HBASE-5875:
--
Hadoop Flags: Reviewed
Status: Patch Available (was: Open)
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
chunhui shen updated HBASE-5875:
Attachment: HBASE-5875v2.patch
@ram
The v2 patch based on second solution, could you take a see.
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch, HBASE-5875v2.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Status: Open (was: Patch Available)
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Attachment: HBASE-5875_0.94_1.patch
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch,
> HBASE-5875_0.94_1.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Attachment: HBASE-5875_0.94.patch
Attached patch is for 0.94.
Trunk has some protobuf changes so the test case needs to be updated.
Again just another way of trying to address this problem. Please provide your
feedback.
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch, HBASE-5875_0.94.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Status: Patch Available (was: Open)
@Chunhui
Can you take a look at this? This is in relation to HBASE-4880. Pls provide
your thoughts
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Attachment: HBASE-5875.patch
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
> Attachments: HBASE-5875.patch
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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[jira] [Updated] (HBASE-5875) Process RIT and Master restart may remove an online server considering it as a dead server
[
https://issues.apache.org/jira/browse/HBASE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ramkrishna.s.vasudevan updated HBASE-5875:
--
Fix Version/s: (was: 0.94.0)
0.94.1
Updated to 0.94.1.
> Process RIT and Master restart may remove an online server considering it as
> a dead server
> --
>
> Key: HBASE-5875
> URL: https://issues.apache.org/jira/browse/HBASE-5875
> Project: HBase
> Issue Type: Bug
>Affects Versions: 0.92.1
>Reporter: ramkrishna.s.vasudevan
>Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.1
>
>
> If on master restart it finds the ROOT/META to be in RIT state, master tries
> to assign the ROOT region through ProcessRIT.
> Master will trigger the assignment and next will try to verify the Root
> Region Location.
> Root region location verification is done seeing if the RS has the region in
> its online list.
> If the master triggered assignment has not yet been completed in RS then the
> verify root region location will fail.
> Because it failed
> {code}
> splitLogAndExpireIfOnline(currentRootServer);
> {code}
> we do split log and also remove the server from online server list. Ideally
> here there is nothing to do in splitlog as no region server was restarted.
> So master, though the server is online, master just invalidates the region
> server.
> In a special case, if i have only one RS then my cluster will become non
> operative.
--
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