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Cisco Bug: CSCvs56528 - Broken Db-replication and high CPU due to multiple db named instances "removed* databases".

Last Modified

Jun 17, 2020

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

12.0(1.10000.10) 12.5(1.10000.22) 12.5(1.12900.108)

Description (partial)

Symptom:
Broken Db-replication and high CPU due to multiple db named instances "removed* databases".

Conditions:
CUCM Version : 12.5.1.12900-108

Under Load CUCM lost DB replication/ showing CCM intentional abort/ PUB CPU spiking. The DB replication was not recovering because of high CPU due to multiple JAVA threads because of stale db named instances "removed* databases"

[root@sea-ucm-pub-01 ~]# top
top - 12:31:43 up 3 days,  6:18,  8 users,  load average: 68.52, 71.39, 88.07
Tasks: 651 total,  14 running, 637 sleeping,   0 stopped,   0 zombie
%Cpu(s): 80.7 us, 18.9 sy,  0.3 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem :  8009500 total,   907504 free,  6293644 used,   808352 buff/cache
KiB Swap:  4095996 total,  2916000 free,  1179996 used.  1224364 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                        
 7981 root      20   0 1330948  60104  14644 S   7.1  0.8   0:02.03 java                                                           
 8266 root      20   0 1331400  54572  14600 S   7.1  0.7   0:01.84 java                                                           
 7968 root      20   0 1330856  59540  14640 S   6.9  0.7   0:02.01 java                                                           
 8593 root      20   0 1331968  54324  14596 S   6.9  0.7   0:01.48 java                                                           
 8251 root      20   0 1330520  53732  14600 S   6.6  0.7   0:01.84 java                                                           
 7978 root      20   0 1331404  60180  14636 S   6.3  0.8   0:01.99 java                                                           
 8037 root      20   0 1331116  54556  14596 S   6.3  0.7   0:01.95 java                                                           
 8482 root      20   0 1331424  54544  14600 S   6.3  0.7   0:01.63 java                                                           
 8576 root      20   0 1331216  54132  14584 S   6.3  0.7   0:01.46 java                                                           
 9150 root      20   0 1329092  51664  14584 S   5.6  0.6   0:01.20 java                                                           
 7183 root      20   0 1332212  65792  14716 S   5.3  0.8   0:02.88 java                                                           
 7235 root      20   0 1331604  65140  14688 S   5.3  0.8   0:02.87 java                                                           
 7304 root      20   0 1332008  65204  14672 S   5.1  0.8   0:02.78 java                                                           
 9162 root      20   0 1329028  51892  14596 S   5.1  0.6   0:01.17 java                                                           
 9413 root      20   0 1328512  50324  14532 S   4.8  0.6   0:00.91 java                                                           
 7306 root      20   0 1331792  65220  14672 S   4.6  0.8   0:02.75 java                                                           
 9138 root      20   0 1329044  51568  14592 S   4.6  0.6   0:01.23 java                                                           
 7192 root      20   0 1331604  64880  14700 S   4.3  0.8   0:02.86 java                                                           
 8891 root      20   0 1328216  51180  14600 S   4.3  0.6   0:01.25 java                                                           
 9068 root      20   0 1329196  52164  14596 S   4.3  0.7   0:01.24 java                                                           
 8893 root      20   0 1329104  51996  14576 S   4.1  0.6   0:01.24 java                                                           
 9456 root      20   0 1328336  49324  14492 S   3.8  0.6   0:00.80 java                                                           
 9927 root      20   0 1317416  36456  13036 S   3.6  0.5   0:00.52 java                                                           
 9951 root      20   0 1318336  36416  13048 S   3.6  0.5   0:00.50 java                                                           
10009 root      20   0 1318472  35348  13052 S   3.6  0.4   0:00.46 java                                                           
10153 root      20   0 1316644  28836  12908 S   3.3  0.4   0:00.33 java                                                           
 7083 root      20   0 1336120  67480  16848 S   3.0  0.8   0:02.91 java                                                           
10099 root      20   0 1316844  30776  12900 S   3.0  0.4   0:00.37 java                                                           
 9666 root      20   0 1327156  44844  14416 S   2.8  0.6   0:00.70 java                                                           
 9769 root      20   0 1317444  40284  13048 S   2.8  0.5   0:00.61 java                                                           
 6956 root      20   0 1336976  67900  16840 S   2.3  0.8   0:03.09 java                                                           
 7003 root      20   0 1338820  69168  16820 S   2.3  0.9   0:03.00 java
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