Frequent dccm restarts with dcc-1.3.25

Gary Mills mills@cc.umanitoba.ca
Tue Jan 24 14:39:13 UTC 2006


On Mon, Jan 23, 2006 at 12:59:56PM -0700, Vernon Schryver wrote:
> > From: Gary Mills 
> 
> > There was a presumably unrelated error early this morning, just after
> > the database rebuild completed:
> >
> > 	Jan 23 03:55:30 electra dccd[15609]: [ID 471644 mail.notice] 1.3.25 database /usr/local/dcc/dcc_db reopened with 2037 MByte window
> > 	Jan 23 03:55:32 electra dccm[15639]: [ID 702911 mail.error] fcntl(F_SETLKW F_WRLCK resolve lock /usr/local/dcc/map 3): Deadlock situation detected/avoided
> 
> That should also be impossible, but it was some kind of dccm locking
> problem again.

This error happened again today.  Here are the log messages in more
detail:

	Jan 24 03:49:02 electra dbclean[26154]: [ID 903678 mail.notice] 1.3.25 cleaning dcc_db
	Jan 24 03:49:06 electra dccd[15609]: [ID 287260 mail.notice] database cleaning begun
	Jan 24 03:49:07 electra dbclean[26154]: [ID 998026 mail.notice] reducing defaults to -e 35hours  -E 22days
	Jan 24 03:50:20 electra dbclean[26154]: [ID 394617 mail.notice] expired 5319685 records and 8646621 checksums, obsoleted 1153491 checksums in dcc_db
	Jan 24 03:53:25 electra dbclean[26154]: [ID 939885 mail.notice] hashed 31618259 records containing 36432269 checksums, compressed 913288 records
	Jan 24 03:53:25 electra dbclean[26154]: [ID 838263 mail.notice] 45293568 hash entries total, 33514242 or 73% used

They were followed by lots of these:

	Jan 24 03:55:00 electra dccm[12258]: [ID 702911 mail.error] no DCC answer from electra.cc.umanitoba.ca (130.179.16.23,6277) after 7318 ms
	Jan 24 03:55:00 electra dccm[12258]: [ID 702911 mail.error] continue not asking DCC 256 seconds after failure

And, finished this way:

	Jan 24 03:55:08 electra dccm[12258]: [ID 702911 mail.error] no DCC answer from electra.cc.umanitoba.ca (130.179.16.23,6277) after 12568 ms
	Jan 24 03:55:10 electra dccm[12258]: [ID 702911 mail.error] continue not asking DCC 2046 seconds after failure
	Jan 24 03:55:13 electra dccd[15609]: [ID 471644 mail.notice] 1.3.25 database /usr/local/dcc/dcc_db reopened with 2037 MByte window
	Jan 24 03:55:13 electra dccm[12258]: [ID 702911 mail.error] continue not asking DCC 2043 seconds after failure
	Jan 24 03:55:14 electra dccm[12258]: [ID 702911 mail.error] fcntl(F_SETLKW F_WRLCK resolve lock /usr/local/dcc/map 4): Deadlock situation detected/avoided

-- 
-Gary Mills-    -Unix Support-    -U of M Academic Computing and Networking-



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