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Old 11-17-2005, 03:25 PM   #1 (permalink)
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Default Blackberry - Hung Threads

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I'm having problems with my BES running Blackberry Enterprise 3.6.5.8 in an Exchange 5.5 environment (5 Exchange 5.5 servers) with hung threads.

All remote exchange servers are receiving a <35ms ping time.

The hung threads appear around the same time everyday (peak load times) then disappear at night. The BES server is running 102 users.

I've been scouring the event logs and noticed the hung threads are due to a single user. The error code is below:

[30038] (11/17 12:40:57):{0xAC8} Thread: *** No Response *** Thread Id=0xE78, Handle=0xFF0, WaitCount=8, RELOAD_FOLDERS event for User: [email address] on Server:

The WaitCount has on occasion been as high as 30!
Also this strange error:

event for User: [email address] on Server:
[30000] (11/17 12:10:55):{0xAC8} Stack Frame Context: ESP=087EF8EC EBP=087EF95C
[30000] (11/17 12:10:55):{0xAC8} Memory dump 087EF8E0, length 1024
[30000] (11/17 12:10:55):{0xAC8} 087EF8E0: 00 00 00 00 00 00 00 00 00 00 00 00 2A 82 F8 77 *............*..w*
[30000] (11/17 12:10:55):{0xAC8} 087EF8F0: 10 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 *................*
[30000] (11/17 12:10:55):{0xAC8} 087EF900: 00 00 00 00 00 FA 7E 08 3C 1C 7B 62 89 D0 73 62 *......~.<.{b..sb*
[30000] (11/17 12:10:55):{0xAC8} 087EF910: 00 00 00 00 05 00 00 00 02 00 00 00 14 D1 73 62 *..............sb*
[30000] (11/17 12:10:55):{0xAC8} 087EF920: 00 00 00 00 00 00 00 00 7C F1 6D 05 B0 22 D2 01 *........|.m.."..*


It turns out this user has a ton of subfolders within his exchange Inbox - The exact number is unknown but it's quite a sight. Is there a work around this issue or do I have to force him to archive some of these subfolders for the greater good. BTW, his mailbox is limited to 95mb with an avg 90mb size. Also the Exchange server the User is located is local to the BES (<1ms)

Blackberry technical support claims there might be corruption with his account and wanted me to remove him from the BES and run the "DBClean.exe" util on his laptop --- However --- TSupport tells me to do a lot of things in the past and has caused more trouble than good, so I'm extremely leary... Any thoughts, suggestions, welcome!
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Old 11-17-2005, 11:08 PM   #2 (permalink)
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That error isn't strange. The BES is doing a Memory Dump in response to a Thread at a Wait Count of 5.

As for the Mailbox corruption that sounds unlikely. I think you hit the nail on the head when you said it occurs during the day but not at night. The BES will still scan the Mailbox in the same way at night so it's not Mailbox specific. I'd focus your investigation on Exchange Performance.
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Old 11-22-2005, 01:48 PM   #3 (permalink)
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Quote:
Originally Posted by BBTechGuy
That error isn't strange. The BES is doing a Memory Dump in response to a Thread at a Wait Count of 5.

As for the Mailbox corruption that sounds unlikely. I think you hit the nail on the head when you said it occurs during the day but not at night. The BES will still scan the Mailbox in the same way at night so it's not Mailbox specific. I'd focus your investigation on Exchange Performance.
That's what I was afraid of ;)
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Old 11-26-2005, 11:35 PM   #4 (permalink)
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The key to ANY hung thread is the action that it is trying to perform. In this case it is RELOAD_FOLDERS.

You said most hung threads are caused by this one user, are the actions always the same (RELOAD_FOLDERS) or different? If they are consistenly different then it is likely a configuration with the users mailbox. This does not mean corruption, but size, latency, are factors to consider.
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