On 02/15/2012 01:56 PM, Iain Morgan wrote:
On Tue, Feb 14, 2012 at 19:54:39 -0600, Rich Megginson wrote:
> On 02/14/2012 06:37 PM, Iain Morgan wrote:
>> Hello,
>>
>> On a fairly frequent basis, one of my 389 DS servers hangs after certain
>> CMP operations. Once this happens, the server cannot be shutdown
>> gracefully. This has been going on for several weeks, and I have not yet
>> found a solution.
>>
>> My setup consists of two systems running RHEL 6.2 with 389 DS 1.2.9.16.
>> Multimaster replication is enabled between the two servers, but the
>> client systems (currently just two test systems) preferrentially use the
>> same server, ServerA. The second server, ServerB, is the one which is
>> experiencing the problem.
>>
>> We are using class-of-service entries to to set the values for the
>> shadowMax, shadowMin, and shadowWarning attributes. And we are
>> conditionally setting a pwdPolicySubentry attribute for some entries in
>> the same manner.
>>
>> If I execute an ldapcompare command, such as the following:
>>
>> # ldapcompare uid=imorgan,ou=People,dc=example,dc=com \
>> pwdpolicysubentry:"cn=Special Policy,ou=Policies,dc=example,dc=com"
>>
>> the command will occassionally hang. Most of the time, the command
>> succeeds and indicates that the attribute is not defined for that entry.
>> However, once or twice a day it will simply hang.
>>
>> The access log shows that the CMP request was received, but no result is
>> logged. After this occurs, the server will not shut down gracefully. The
>> init script fails to shut down the server and I end up having to send a
>> SIGKILL to ns-slapd.
> When you get the hang, can you attach to the process with gdb?
> ps -ef|grep ns-slapd
> gdb /usr/sbin/ns-slapd pid-of-ns-slapd
>> The error log does not report any issues.
>>
>> CMP operations against other attributes, such as loginShell, do not seem
>> to exhibit this problem. Also, the problem does not occur on ServerA;
>> only on ServerB. Once the CMP operation has hung, comparisons against
>> other attributes, even shadowMax, continue to work.
>>
>> As noted above, most of the time the CMP operation returns normally.
>> However, if I reinitialize ServerB from ServerA, the problem occurs with
>> the first CMP operation against ServerB.
>>
>> Both servers have the same set of RPMs and the dse.ldif on both systems
>> do not have any significant differences.
>>
>> Has anyone seen a similar issue? Any suggestions on how to debug of fix
>> this?
>>
>> A somewhat simplified and redacted version of the class-of-service
>> configuration is listed below.
>>
>> Thanks
A gzip'd copy of the 'thread apply all bt full' output is attached.
Thanks. Can you do this again after installing the
389-ds-base-debuginfo package?
debuginfo-install 389-ds-base
Are you using Views?
http://docs.redhat.com/docs/en-US/Red_Hat_Directory_Server/9.0/html/Admin...