Couchbase Server

memcached process is not killed when uninstall is run when memcached persistent queue is still processing data

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  • Flagged:
    Release Note

Description

When uninstall membase server version membase-server-enterprise_x86_64_v0.0.0-176-g1a77283.deb, the uninstall proccess does not kill memcached.

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Thuan Nguyen added a comment -
Test on build 177. I don't see memcached process after uninstall membase server
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Thuan Nguyen added a comment - Test on build 177. I don't see memcached process after uninstall membase server
Thuan Nguyen made changes -
Field Original Value New Value
Status Open [ 1 ] Resolved [ 5 ]
Resolution Fixed [ 1 ]
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Thuan Nguyen added a comment -
I still see membase serice after uninstall membase server version basestar-182 in ubuntu 1004 32bit
http://screencast.com/t/qeOuiivIQ
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Thuan Nguyen added a comment - I still see membase serice after uninstall membase server version basestar-182 in ubuntu 1004 32bit http://screencast.com/t/qeOuiivIQ
Thuan Nguyen made changes -
Resolution Fixed [ 1 ]
Status Resolved [ 5 ] Reopened [ 4 ]
Sharon Barr made changes -
Fix Version/s 1.7 beta 1 [ 10110 ]
Fix Version/s 1.7 alpha 1 [ 10170 ]
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Steve Yen added a comment -
The remaining process is an epmd process, which is not the memcached process, but is instead the erlang port mapper daemon (epmd).

There's already some older bug which covers the issue that epmd is still running after an uninstall on linux, so marking this one as a duplicate.
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Steve Yen added a comment - The remaining process is an epmd process, which is not the memcached process, but is instead the erlang port mapper daemon (epmd). There's already some older bug which covers the issue that epmd is still running after an uninstall on linux, so marking this one as a duplicate.
Steve Yen made changes -
Status Reopened [ 4 ] Resolved [ 5 ]
Resolution Duplicate [ 3 ]
Sharon Barr made changes -
Priority Major [ 3 ] Critical [ 2 ]
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Steve Yen added a comment -
Hearing more instances of this still since yesterday.

Farshid is adding 'ps' output to the test suite so we can get more proof.
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Steve Yen added a comment - Hearing more instances of this still since yesterday. Farshid is adding 'ps' output to the test suite so we can get more proof.
Steve Yen made changes -
Resolution Duplicate [ 3 ]
Status Resolved [ 5 ] Reopened [ 4 ]
Farshid Ghods made changes -
Priority Critical [ 2 ] Major [ 3 ]
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Farshid Ghods added a comment -
this behavior is expected so that we dont lose any data during uninstallation.
the workaround is that the user
1- do not uninstall membase if its still processing data in the persisten queue
2- run killall -9 memcached after uninstall but before reinstallation
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Farshid Ghods added a comment - this behavior is expected so that we dont lose any data during uninstallation. the workaround is that the user 1- do not uninstall membase if its still processing data in the persisten queue 2- run killall -9 memcached after uninstall but before reinstallation
Farshid Ghods made changes -
Summary memcached process is not killed when uninstall membase server in ubuntu memcached process is not killed when uninstall is run when memcached persistent queue is still processing data
Flagged [Release Note]
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Steve Yen added a comment -
Killing memcached harshly would lose customer data (items in the persistence queue that are still waiting to drain to disk).

Although an uninstall is a strong user command, the "do no harm (do no data loss)" philosophy seems to be the safe choice.
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Steve Yen added a comment - Killing memcached harshly would lose customer data (items in the persistence queue that are still waiting to drain to disk). Although an uninstall is a strong user command, the "do no harm (do no data loss)" philosophy seems to be the safe choice.
Steve Yen made changes -
Status Reopened [ 4 ] Resolved [ 5 ]
Fix Version/s 1.7 beta 1 [ 10110 ]
Resolution Won't Fix [ 2 ]
Farshid Ghods made changes -
Labels 1.7.0-release-notes
Farshid Ghods made changes -
Labels 1.7.0-release-notes 1.7.0-release-notes 1.7.1-release-notes
Peter Wansch made changes -
Component/s bucket-engine [ 10010 ]
Component/s memcached-bucket(default-engine) [ 10015 ]
Farshid Ghods made changes -
Status Resolved [ 5 ] Closed [ 6 ]

People

  • Assignee:
    Steve Yen
    Reporter:
    Thuan Nguyen
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Dates

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    Updated:
    Resolved: