Chris you need to follow the trail. as the error points . the error is in cluster group service operations which means there is something goign on with the clusterware. Use the doc below to follow the trail to the problem. 10g/11gR1: Diagnosing 'ORA-29702: error occurred in Cluster Group Service operation' (Doc ID 848622.1) On Tuesday, October 21, 2014 3:05 PM, Chris Taylor <christopherdtaylor1994@xxxxxxxxx> wrote: Guys, Versions: ASM instance = 188.8.131.52 Database instance = 184.108.40.206 Clusterware version = 220.127.116.11 OS = Red Hat 5.7 I'm on a new client site and I'm doing some fact finding about their environment. While logged into their +ASM instance, I did the following: select * from v$asm_disk; (just to see the disks that are allocated) I received the following error: select * from v$asm_disk * ERROR at line 1: ORA-15032: not all alterations performed ORA-29702: error occurred in Cluster Group Service operation ORA-29702: error occurred in Cluster Group Service operation When this happened, the Production Oracle DB connected to this ASM instance started complaining about ENQ: SQ - Contention on SYS objects. I'm curious if these 2 events are related and am still investigating. So, here's my question: Has anyone seen this ORA-15032 when logged into their ASM instance directly and querying V$ASM_DISK ? We're seeing the ORA-15032 from our prod instance occasionally and we think we have a patch to apply for that but now I'm wondering if it's something deeper.