Symptoms

Avamar garbage collection fails with the following error: Last GC: finished Fri May 22 12:25:36 2015 after 52m 16s >> recovered 0.00 KB (MSG_ERR_DUPLICATE)

Cause

Garbage collection was started more than once within a short time. This can be verified by sending the output of theGC maintenance logs to a file and reviewing the contents: dumpmaintlogs --types=gc --days=5 > gc-maint.log.`date +%y%m%d` The following maintenance log extract shows a second garbage collection job issued within 15 minutes of an existing job: 2015/05/22-08:38:20.80007 {0.3} <4200> starting garbage collection <-- Manually started GC 2015/05/22-08:38:20.80361 {0.3} <?xml version="1.0" encoding="UTF-8" standalone="yes"?> 2015/05/22-08:38:20.80362 {0.3} <gcflags gccount="0" gcmincount="0" kill="0" limitadjust="0" maxpass="100" maxtime="3600" refcheck="true" throttlelevel="0" usehistory="false" orphansfirst="false"/> 2015/05/22-08:53:41.40871 {0.1} <4200> starting scheduled garbage collection <-- Regular scheduled GC 2015/05/22-08:53:41.41290 {0.1} <?xml version="1.0" encoding="UTF-8" standalone="yes"?> 2015/05/22-08:53:41.41290 {0.1} <gcflags gccount="0" gcmincount="0" kill="0" limitadjust="5" maxpass="0" maxtime="20700" refcheck="true" throttlelevel="0" usehistory="false" orphansfirst="false"/> 2015/05/22-09:25:36.41769 {0.0} <4202> failed garbage collection with error MSG_ERR_DUPLICATE 2015/05/22-09:25:36.41826 {0.3} <4202> failed garbage collection with error MSG_ERR_DUPLICATE 2015/05/22-09:25:36.92242 {0.6} <4202> failed garbage collection with error MSG_ERR_DUPLICATE 2015/05/22-09:25:37.00909 {0.1} <4202> failed garbage collection with error MSG_ERR_DUPLICATE

Resolution

Do not attempt to run garbage collection manually. Allow garbage collection to run as scheduled by the maintenance scheduler. For more information, see Avamar: About the use of manual Garbage Collection.

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