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From Yang <teddyyyy...@gmail.com>
Subject Re: SIGSEGV during compaction?
Date Thu, 08 Sep 2011 16:47:43 GMT
this is trunk.


sorry I did more tests, the -XX:-UseCompressedOops suggested by
Jonathan actually DOES solve the problem.  my previous tries possibly
used the wrong scripts.

Thanks guys

Yang

On Thu, Sep 8, 2011 at 12:07 AM, Sylvain Lebresne <sylvain@datastax.com> wrote:
> Are you using current trunk ? Or 0.8 ?
>
> Because if on trunk, a SIGSEGV could also be due to CASSANDRA-2521,
> if we happen to force the unmapping of a file but tries to access it afterwards
> (which shouldn't happen but ...).
>
> --
> Sylvain
>
> On Thu, Sep 8, 2011 at 7:36 AM, Yang <teddyyyy123@gmail.com> wrote:
>> hmmmm, all other things remaining the same, I put jna.jar into classpath,
>> now it successfully completed a compaction without problems
>>
>> On Wed, Sep 7, 2011 at 10:06 PM, Yang <teddyyyy123@gmail.com> wrote:
>>> thanks Jonathan.
>>>
>>> I tried openJdk too, same , filed bug to both Oracle and openJdk
>>>
>>>
>>> tried -XX:-UseCompressedOops , same SEGV
>>>
>>> Oracle bug site asks "does it appear with -server and -Xint", I tried
>>> these options, so far no SEGV yet, maybe slower, but haven't measured
>>> exactly
>>>
>>>
>>>
>>> On Wed, Sep 7, 2011 at 8:56 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
>>>> You should report a bug to Oracle.
>>>>
>>>> In the meantime you could try turning off compressed oops -- that's
>>>> been a source of a lot of GC bugs in the past.
>>>>
>>>> On Wed, Sep 7, 2011 at 8:22 PM, Yang <teddyyyy123@gmail.com> wrote:
>>>>> some info in the debug file that JVM exported:
>>>>>
>>>>> #
>>>>> # A fatal error has been detected by the Java Runtime Environment:
>>>>> #
>>>>> #  SIGSEGV (0xb) at pc=0x00002aaaab37cbfa, pid=7236, tid=1179806016
>>>>> #
>>>>> # JRE version: 6.0_27-b07
>>>>> # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.2-b06 mixed mode
>>>>> linux-amd64 compressed oops)
>>>>> # Problematic frame:
>>>>> # J  com.cgm.whisky.filter.WithinLimitIpFrequencyCap.isValid(Lorg/apache/avro/specific/SpecificRecord;)Lcom/cgm/whisky/EventsFilter$ValidityCode;
>>>>> #
>>>>> # If you would like to submit a bug report, please visit:
>>>>> #   http://java.sun.com/webapps/bugreport/crash.jsp
>>>>> #
>>>>>
>>>>> ---------------  T H R E A D  ---------------
>>>>>
>>>>> Current thread (0x00002aaab80e2800):  JavaThread "pool-3-thread-8"
>>>>> [_thread_in_Java, id=7669,
>>>>> stack(0x0000000046426000,0x0000000046527000)]
>>>>>
>>>>> siginfo:si_signo=SIGSEGV: si_errno=0, si_code=1 (SEGV_MAPERR),
>>>>> si_addr=0x00002aaabc000000
>>>>>
>>>>> Registers:
>>>>> RAX=0x00000007914355e8, RBX=0x000000000000058a,
>>>>> RCX=0x0000000791461b38, RDX=0x0000000000000000
>>>>> RSP=0x00000000465259f0, RBP=0x00000000f222b894,
>>>>> RSI=0x0000000791433f20, RDI=0x00002aaaab37ca60
>>>>> R8 =0x00000000d0931f61, R9 =0x00000000f2286ab2,
>>>>> R10=0x0000000000000000, R11=0x00002aaabc000000
>>>>> R12=0x0000000000000000, R13=0x00000000465259f0,
>>>>> R14=0x0000000000000002, R15=0x00002aaab80e2800
>>>>> RIP=0x00002aaaab37cbfa, EFLAGS=0x0000000000010202,
>>>>> CSGSFS=0x0100000000000033, ERR=0x0000000000000004
>>>>>  TRAPNO=0x000000000000000e
>>>>>
>>>>> Top of Stack: (sp=0x00000000465259f0)
>>>>> 0x00000000465259f0:   000000068a828dc8 0000000791433f20
>>>>> 0x0000000046525a00:   000000079145ee60 000005890000058a
>>>>>
>>>>>
>>>>> On Wed, Sep 7, 2011 at 6:21 PM, Yang <teddyyyy123@gmail.com> wrote:
>>>>>> I started compaction using nodetool,
>>>>>> then always reproducibly, I get a SEGV in a code that I added to
the
>>>>>> Cassandra code, which simply calls get_slice().
>>>>>>
>>>>>> have you seen SEGV associated with compaction? anyone could suggest
a
>>>>>> route on how to debug this?
>>>>>>
>>>>>> I filed a bug on sun website, right now the only possible approach
I
>>>>>> can try is to use another JDK
>>>>>>
>>>>>>
>>>>>> Thanks
>>>>>> Yang
>>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Jonathan Ellis
>>>> Project Chair, Apache Cassandra
>>>> co-founder of DataStax, the source for professional Cassandra support
>>>> http://www.datastax.com
>>>>
>>>
>>
>

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