** Description changed:
+ TEST CASE:
+
+ 1. install memcached and python-memcache
+ 2. edit /etc/memcached.conf and change -m 64 to -m 640
+ 3. sudo service memcached restart
+ 4. Run the following test script with '300000' as an argument
+
+ #!/usr/bin/python
+
+ import memcache
+ import sys
+
+ mc = memcache.Client(['127.0.0.1:11211'], debug=1)
+
+ i=0
+ while i < int(sys.argv[1]):
+ mc.set("key_%09d" % i, "A" * 1024)
+ i += 1
+
+
+ 5. Run the script again, with 1000000 with & to background it
+ 6. sudo service memcached restart
+ 7. verify that memcached is running (pidof memcached). If it is not, then
this bug exists.
+
+ As this is a race condition, you may have to repeat steps 4 through 7 a
+ few times before you reproduce the issue. On precise, it took about 15
+ tries. If you have the older version of /etc/init.d/memcached which does
+ 'sleep 1' in it, then you can make it more likely by removing the sleep
+ 1.
+
+ ----
+
Binary package hint: memcached
I have noticed that sometimes on a production memcached service the
restart command is not always reliable. If the memcached process has
allocated a lot of memory, it sometimes take a little while to shut
down.
The init.d script seems to approach this by inserting a "sleep 1" between the
stop and start operations, but that's not always enough.
When the memcached service is started again it will fail to start with the
error "failed to listen on TCP port XXXXX: Address already in use" since the
dying process still owns the port.
Release: Ubuntu 10.10
-
memcached:
- Installed: 1.4.5-1ubuntu1
- Candidate: 1.4.5-1ubuntu1
- Version table:
- *** 1.4.5-1ubuntu1 0
- 500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ maverick/main
amd64 Packages
- 100 /var/lib/dpkg/status
+ Installed: 1.4.5-1ubuntu1
+ Candidate: 1.4.5-1ubuntu1
+ Version table:
+ *** 1.4.5-1ubuntu1 0
+ 500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ maverick/main
amd64 Packages
+ 100 /var/lib/dpkg/status
--
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to memcached in Ubuntu.
https://bugs.launchpad.net/bugs/795673
Title:
init.d restart operation can fail without proper notice if the
memcached process takes a long time (> 1s) to shut down
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