[Glass] Swazoo server hangs

Tue Nov 5 07:40:39 PST 2013

Sorry Otto, I have been in Argentina this last week and haven't been able to focus on "hard problems" ... Swazoo has always been a bit dicey on GemStone, which is one of the main reasons to prefer FastCGI. I think that Zinc is more stable - Johan uses Zinc in production (and perhaps others) ... Also Zinc has support for running client-side HTTP which is very convenient ...

I will have to dig in a bit more ... but I just seem to recall that I didn't feel comfortable with the level of bugfixing that needed to go on ... 

Dale
----- Original Message -----
| From: "Otto Behrens" <otto at finworks.biz>
| To: glass at lists.gemtalksystems.com
| Sent: Wednesday, October 30, 2013 2:50:23 AM
| Subject: [Glass] Swazoo server hangs
| 
| Hi,
| 
| We are running GS 2.4.4.4 with Seaside30 3.0.7 and Swazoo2 2.2.0.4.
| 
| We run 4 swazoo servers reverse proxied behind nginx. The problem is
| that our Swazoo server hangs up. There is a socket listening on the
| known port. The process is idle, but it does not respond to requests
| -
| connecting to the port times out.
| 
| Sending kill -USR1 <pid> gives us the output below. We have a
| monitoring process that picks up this condition and kills the
| process.
| But this causes the site to be unresponsive until it starts up again.
| 
| Do you have any suggestion how to solve this? Have you seen this
| problem on your applications? Will an upgrade to GS 3 help?
| 
| Thanks
| Otto
| 
| GemStone signal handler: signal 10 (SIGUSR1), received from process
| 28660 userId 1000
|   si_code: 0, SI_USER, signal from kill(2), sigsend(2), raise(3C) or
|   abort(3C)
| 
| Begin attempt to print C-level stack at: Wed Oct 30 11:28:01 SAST
| 2013
| 
| 
| End of C-level stack:
| 
| ----------- Lock not acquired - retrying LOG ENTRY: Session lock
| denied: 2075-----------
| 
| Printing Smalltalk stack for memory usage diagnosis:
| Smalltalk stack: printing to topaz .out file at [10/30/2013 11:28:01
| AM.783 SAST]
|     iS->ARStackPtr = 0x7f6298ea70a0, offset from base = 20
| 1 = TOP OF STACK,   stackDepth = 10
| 
| 1  ProcessorScheduler >> _reapEvents: @IP 132  [GsMethod 498429953]
|    16: 0x7f6265153ff0 (cls:66817 Array) size:0)
|    15: 10 (SmallInteger 1)
|    14: 10 (SmallInteger 1) <--framePtr=0x7f6298ea7090 AR[18]
|   VC at 0x7f6265153f60   VC.unwindBlock= 20 (OOP_NIL)  VC.serialNum=
| 3005013794875392082 (SmallInteger 375626724359424010)
|    13: 3005013794875392082 (SmallInteger 375626724359424010)
|    12: 20 (OOP_NIL)
|    11: 20 (OOP_NIL)
|    10: 0x7f6265153ff0 (cls:66817 Array) size:0)
|    9: 0x7f6265153ff0 (cls:66817 Array) size:0)
|    8: 268 (OOP_TRUE)
|    7: 2 (SmallInteger 0)
|    6: 26 (SmallInteger 3)
|    5: 80002 (SmallInteger 10000)
|    4: 10 (SmallInteger 1)
|    3: 11065002175282 (SmallInteger 1383125271910)
|    2: 0x7f627f5ea790 (cls:92929 SortedCollection) size:3)
|    1: 268 (OOP_TRUE)
| rcvr: 0x7f627f49d758 (cls:116481 ProcessorScheduler) size:11)
| [framePtr=0x7f6298ea7090 AR[18]]
| 
| 2  ProcessorScheduler >> _findReadyProcess @IP 13  [GsMethod
| 498434561]
|    1: 20 (OOP_NIL)
| rcvr: 0x7f627f49d758 (cls:116481 ProcessorScheduler) size:11)
| <--framePtr=0x7f6298ea7080 AR[16]
| 
| 3  ProcessorScheduler >> _reschedule @IP 13  [GsMethod 498439425]
|    2: 20 (OOP_NIL)
|    1: 0x7f627f5ec4a8 oid:289184257 (cls:99841 GsProcess) size:22)
| rcvr: 0x7f627f49d758 (cls:116481 ProcessorScheduler) size:11)
| <--framePtr=0x7f6298ea7068 AR[13]
| 
| 4  GsProcess >> _wait @IP 13  [GsMethod 260628481]
| rcvr: 0x7f627f5ec4a8 oid:289184257 (cls:99841 GsProcess) size:22)
| <--framePtr=0x7f6298ea7060 AR[12]
| 
| 5  Delay >> wait @IP 54  [GsMethod 498471937]
| rcvr: 0x7f6265153f10 (cls:115969 Delay) size:3)
| <--framePtr=0x7f6298ea7058 AR[11]
| 
| 6  WAGsSwazooAdaptor >> start @IP 20  [GsMethod 3440353793]
| rcvr: 0x7f627f50e858 oid:20135281153 (cls:42137601
| FinWorksGsSwazooAdaptor) size:5) <--framePtr=0x7f6298ea7050 AR[10]
| 
| 7  WAServerAdaptor (C)  >> startOn: @IP 27  [GsMethod 3494994433]
|    2: 0x7f627f50e858 oid:20135281153 (cls:42137601
| FinWorksGsSwazooAdaptor) size:5)
|    1: 64026 (SmallInteger 8003)
| rcvr: 0x7f6291984060 oid:42137601 (cls:42128385
| FinWorksGsSwazooAdaptor (C) ) size:19) <--framePtr=0x7f6298ea7038
| AR[7]
| 
| 8  WAGemStoneRunSeasideGems >> startOn: @IP 13  [GsMethod 3494978817]
|    1: 64026 (SmallInteger 8003)
| rcvr: 0x7f627f5f99e8 (cls:1470662657 WAGemStoneRunSeasideGems)
| size:3)
| <--framePtr=0x7f6298ea7028 AR[5]
| 
| 9  WAGemStoneRunSeasideGems (C)  >> startGemServerOn: @IP 21
| [GsMethod 3494925057]
|    2: 0x7f627f50e948 (cls:1470662657 WAGemStoneRunSeasideGems)
|    size:3)
|    1: 64026 (SmallInteger 8003)
| rcvr: 0x7f62919839b0 oid:1470662657 (cls:1470665729
| WAGemStoneRunSeasideGems (C) ) size:19) <--framePtr=0x7f6298ea7010
| AR[2]
| 
| 10  (Executed Code) @IP 71  [GsMethod 0x7f6294094058]
| rcvr: 20 (OOP_NIL) <--framePtr=0x7f6298ea7008 AR[1]
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