Re: [squid-users] Crash on Squid when clearign cache

Balaji Ganesan wrote:
> Hi,
> We are having squid crash a few times and creating Watson dumps when
> user clears cache. We do stop the squid ( using Terminate Process),
> clean the cache and restart it. This happens on field and we don't have
> much info. The crash however seems to point to the squid source.. We are
> using Squid version 2.5 STABLE 9. Is this a known issue on this version?

It's a known issue on all versions that starting Squid without correct
cache directories is fatal.

Please:
  * use a newer release from http://squid.acmeconsulting.it/

  * do not manually erase cache files.
     Squid performs cache data updates live on demand. Reverse proxy
accelerators are the only confirmed case needing cache deletion. If you
are using one such reverse-proxy I would suggest that a windows build
with its FD limits is not the best option.

  * use "squid -z" to reconstruct cache directories before starting
squid if they are lost or erased.
http://wiki.squid-cache.org/SquidFaq/ClearingTheCache

Amos

> I tried searching on the release notes for this version and also on
> Squid version 2.6 release notes but couldn't find any reference to this.
> Can anyone please help us out on what might be the cause and help
> resolve it.
>
>
>
>
>
> Details of the crash is as below:
>
> FAULTING_IP:
> ventcsquid!ipc_thread_1+21e7 [\squid-2.5.STABLE9-NT-CVS\src\ipc.c @ 801]
> 0044c145 ?? ???
>
> EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff)
> ExceptionAddress: 0044c145 (ventcsquid!ipc_thread_1+0x000021e7)
> ExceptionCode: c0000005 (Access violation)
> ExceptionFlags: 00000000
> NumberParameters: 2
> Parameter[0]: 00000000
> Parameter[1]: 2af1b8a8
> Attempt to read from address 2af1b8a8
>
> PROCESS_NAME: ventcsquid.exe
>
> ADDITIONAL_DEBUG_TEXT:
> Use '!findthebuild' command to search for the target build information.
> If the build information is available, run '!findthebuild -s ; .reload'
> to set symbol path and load symbols.
>
> FAULTING_MODULE: 7c900000 ntdll
>
> DEBUG_FLR_IMAGE_TIMESTAMP: 49a64ee1
>
> ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at "0x%08lx"
> referenced memory at "0x%08lx". The memory could not be "%s".
>
> EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at "0x%08lx"
> referenced memory at "0x%08lx". The memory could not be "%s".
>
> EXCEPTION_PARAMETER1: 00000000
>
> EXCEPTION_PARAMETER2: 2af1b8a8
>
> READ_ADDRESS: 2af1b8a8
>
> FOLLOWUP_IP:
> ventcsquid!ipc_thread_1+21e7
> [C:\VClient_4.5.1_9thFeb\vent2\squid\client\squid-2.5.STABLE9-NT-CVS\src
> \ipc.c @ 801]
> 0044c145 ?? ???
>
> FAULTING_THREAD: 00001030
>
> BUGCHECK_STR: APPLICATION_FAULT_INVALID_POINTER_READ_WRONG_SYMBOLS
>
> PRIMARY_PROBLEM_CLASS: INVALID_POINTER_READ
>
> DEFAULT_BUCKET_ID: INVALID_POINTER_READ
>
> IP_ON_HEAP: 00b30650
>
> FRAME_ONE_INVALID: 1
>
> LAST_CONTROL_TRANSFER: from 00b30650 to 0044c145
>
> STACK_TEXT:
> 00ecfbd0 00b30650 00000001 00000009 00000001
> ventcsquid!ipc_thread_1+0x21e7
> [C:\VClient_4.5.1_9thFeb\vent2\squid\client\squid-2.5.STABLE9-NT-CVS\src
> \ipc.c @ 801]
> WARNING: Frame IP not in any known module. Following frames may be
> wrong.
> 00ecff7c 00493957 0012fd14 0000007c 00000000 0xb30650
> 00ecffb4 7c80b713 00b30650 0000007c 00000000
> ventcsquid!_beginthreadex+0xf4
> 00ecffec 00000000 004938ce 00b30650 00000000
> kernel32!GetModuleFileNameA+0x1b4
>
>
> STACK_COMMAND: ~3s; .ecxr ; kb
>
> FAULTING_SOURCE_CODE:
> 797:
> 798: cleanup:
> 799: if (c2p[1] != -1)
> 800: close(c2p[1]);
>> 801: if (fd_table[crfd].flags.open)
> 802: ipcCloseAllFD(-1, -1, crfd, cwfd);
> 803: if (prfd_ipc != -1) {
> 804: send(crfd_ipc, shutdown_string, strlen(shutdown_string), 0);
> 805: shutdown(crfd_ipc, SD_BOTH);
> 806: shutdown(prfd_ipc, SD_BOTH);
>
>
> SYMBOL_STACK_INDEX: 0
>
> SYMBOL_NAME: ventcsquid!ipc_thread_1+21e7
>
> FOLLOWUP_NAME: MachineOwner
>
> MODULE_NAME: ventcsquid
>
> IMAGE_NAME: ventcsquid.exe
>
> BUCKET_ID: WRONG_SYMBOLS
>
> WATSON_IBUCKET: 360931898
>
> WATSON_IBUCKETTABLE: 1
>
> FAILURE_BUCKET_ID:
> INVALID_POINTER_READ_c0000005_ventcsquid.exe!ipc_thread_1
>
>
> Thanks
> Balaji
>

-- 
Please be using
   Current Stable Squid 2.7.STABLE6 or 3.0.STABLE16
   Current Beta Squid 3.1.0.8