[389-users] 389 directory server crash

Wed Jul 17 07:52:17 UTC 2013

On 07/16/2013 04:49 PM, Rich Megginson wrote:
> On 07/16/2013 01:23 AM, Mitja Mihelič wrote:
>> On 07/15/2013 05:28 PM, Rich Megginson wrote:
>>> On 07/15/2013 02:57 AM, Mitja Mihelič wrote:
>>>> On 07/12/2013 05:55 PM, Rich Megginson wrote:
>>>>> On 07/12/2013 08:22 AM, Mitja Mihelič wrote:
>>>>>> On 07/09/2013 03:34 PM, Rich Megginson wrote:
>>>>>>> On 07/09/2013 06:43 AM, Mitja Mihelič wrote:
>>>>>>>> Hi!
>>>>>>>>
>>>>>>>> We are having problems with some our 389-DS instances. They 
>>>>>>>> crash after receiving an update from the provider.
>>>>>>>
>>>>>>> After looking at the stack trace, I think this is 
>>>>>>> https://fedorahosted.org/389/ticket/47391
>>>> Yes, it looks like it might be it. When CONSUMER_ONE crashed for 
>>>> the first time, the last thing replicated was a password change.
>>>> Do you perhaps know, where I could get a 389DS version for Centos6 
>>>> that has the patch? The ticket says it was pushed to 1.2.11, but 
>>>> would seem that our 1.2.11.15-14 is still an unpatched one and the 
>>>> repositories do not have any newer versions.
>>>
>>> Is that the 389-ds-base that is included with CentOS6?
>> Yes, the 389-ds-base-1.2.11.15-14.el6_4.x86_64 and 
>> 389-ds-base-libs-1.2.11.15-14.el6_4.x86_64 are from the official 
>> Centos6 updates repoository.
>> 389-ds-base-debuginfo is from http://debuginfo.centos.org/6/
>> The rest are from epel.
>
> Looking at the stack trace you sent earlier - there is only 1 thread?  
> You ran
> gdb -ex 'set confirm off' -ex 'set pagination off' -ex 'thread apply all bt full' -ex 'quit' /usr/sbin/ns-slapd `pidof ns-slapd` > stacktrace.`date +%s`.txt 2>&1
>
>
> ?  If so, I have no idea what's going on - I've never seen the server deadlock itself with only 1 thread . . .
I ran
gdb -ex 'set confirm off' -ex 'set pagination off' -ex 'thread apply all 
bt full' -ex 'quit' /usr/sbin/ns-slapd `pidof -o 49171 ns-slapd` > 
stacktrace.`date +%s`.txt 2>&1
The "-o 49171" is to exclude the pid of the config server instance, so 
only the problematic pid was looked at.
If you get any more information regarding this crash it would be very 
much appreciated.

It may be best if I removed all 389DS related data from both of the 
consumer servers and start fresh. If they crash again I will send the 
relevant stack traces.

>
>
>
>>>
>>>>>>>
>>>>>>>> The crash happened twice after about a week of running without 
>>>>>>>> problems. The crashes happened on two consumer servers but not 
>>>>>>>> at the same time.
>>>>>>>> The servers are running CentOS 6x with the following 389DS 
>>>>>>>> packages installed:
>>>>>>>> 389-ds-console-doc-1.2.6-1.el6.noarch
>>>>>>>> 389-console-1.1.7-1.el6.noarch
>>>>>>>> 389-adminutil-1.1.15-1.el6.x86_64
>>>>>>>> 389-dsgw-1.1.10-1.el6.x86_64
>>>>>>>> 389-ds-base-debuginfo-1.2.11.15-14.el6_4.x86_64
>>>>>>>> 389-admin-1.1.29-1.el6.x86_64
>>>>>>>> 389-ds-console-1.2.6-1.el6.noarch
>>>>>>>> 389-admin-console-doc-1.1.8-1.el6.noarch
>>>>>>>> 389-ds-1.2.2-1.el6.noarch
>>>>>>>> 389-ds-base-1.2.11.15-14.el6_4.x86_64
>>>>>>>> 389-ds-base-libs-1.2.11.15-14.el6_4.x86_64
>>>>>>>> 389-admin-console-1.1.8-1.el6.noarch
>>>>>>>>
>>>>>>>> We are in the process of replacing the Centos 5x base 
>>>>>>>> consumer+provider setup with a CentOS 6x base one. For the time 
>>>>>>>> being, the CentOS 6 machines are acting as consumers for the 
>>>>>>>> old server. They run for a while and then the replicated 
>>>>>>>> instances crash though not at the same time.
>>>>>>>> One of the servers did not want to start after the crash,
>>>>>>>
>>>>>>> Can you provide the error messages from the errors log?
>>>>>> I have attached error logs from the provider 
>>>>>> (2013-06-27-provider_error) and the consumer 
>>>>>> (2013-06-27-server_two_error) in question.
>>>>>>>
>>>>>>>> so I have run db2index on its database. It's been running for 
>>>>>>>> four days and it has still not finished. 
>>>>>>>
>>>>>>> Try exporting using db2ldif, then importing using ldif2db.
>>>>>> The export process hangs. After an hour strace still shows:
>>>>>> futex(0x7f5822670ed4, FUTEX_WAIT, 1, NULL
>>>>>> The error log for this is attached as 
>>>>>> 2013-07-10-server_two-ldif_import_hangs.
>>>>>
>>>>> Are you using db2ldif or db2ldif.pl?  If you are using db2ldif, is 
>>>>> the server running?  If not, please try first shutting down the 
>>>>> server and use db2ldif.
>>>>>
>>>>> If db2ldif still hangs, then please follow the instructions at 
>>>>> http://port389.org/wiki/FAQ#Debugging_Hangs to get a stack trace 
>>>>> of the hung process.
>>>> I was using db2ldif with the server shut down. I tried it again and 
>>>> it hung. The LDIF file was created but its size was zero. The 
>>>> produced stack trace is attached as 
>>>> server_two-db2ldif_hang-stacktrace.1373877200.txt.
>>>>
>>>>>
>>>>>>
>>>>>>>
>>>>>>>> All I get from db2index now are these outputs:
>>>>>>>> [09/Jul/2013:13:29:11 +0200] - reindex db: Processed 65095 
>>>>>>>> entries (pass 1104) -- average rate 53686277.5/sec, recent rate 
>>>>>>>> 0.0/sec, hit ratio 0%
>>>>>>>
>>>>>>> How many entries do you have in your database?
>>>>>> The number revolves around 65400. It varies perhaps 2 user 
>>>>>> del/add operations a month and 20 attribute changes per week, if 
>>>>>> that.
>>>>>>>
>>>>>>>>
>>>>>>>> The other instance did start up, but the replication process 
>>>>>>>> did not work anymore. I disabled the replication to this host 
>>>>>>>> and set it up again. I chose "Initialize consumer now" and the 
>>>>>>>> consumer crashed every time.
>>>>>>>
>>>>>>> Can provide a stack trace of the core when the server crashes?  
>>>>>>> This may be different than the stack trace below.
>>>>>> The last provided stack trace was produced at the last server 
>>>>>> crash. I will provide another stack trace when CONSUMER_ONE 
>>>>>> crashes again. Currently it refuses to crash at initialization 
>>>>>> time and keeps running.
>>>>>>>
>>>>>>>> I have enabled full error logging and could find nothing.
>>>>>>>> I have read a few threads (not all, I admit) on this list and 
>>>>>>>> http://directory.fedoraproject.org/wiki/FAQ#Debugging_Crashes 
>>>>>>>> and tried to troubleshoot.
>>>>>>>>
>>>>>>>> The crash produced the attached core dump and I could use your 
>>>>>>>> help with understanding it. As well as any help with the crash. 
>>>>>>>> If more info is needed I will gladly provide it.
>>>>>>>>
>>>>>>>> Regards, Mitja
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> 389 users mailing list
>>>>>>>> 389-users at lists.fedoraproject.org
>>>>>>>> https://admin.fedoraproject.org/mailman/listinfo/389-users
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>

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