Category Archives: Oracle RAC

Migrating 2 node RAC Cluster to new H/W and Adding a Failed Node back in RAC Cluster (#OracleRACAddNode, #OracleRAC)

Scenario: RAC Cluster Database which was setup on 2 nodes, needs a migration to new H/W. Also, adding to this, the 2nd node of RAC Cluster is dead just before this activity was started (& this 2nd node cannot be … Continue reading

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PRVG-1011 : The CRS software versions found on cluster nodes “node1” and “node2” do not match on Linux

Issue: [TASKNODEADDDELETE]:TASK_SUMMARY:FAILED:CRITICAL:VERIFICATION_FAILED ERRORMSG(node2): PRVG-1011 : The CRS software versions found on cluster nodes “node1” and “node2” do not match INFO: *************** End of CVU Error logs *************** INFO: All forked task are completed at state performChecks Resolution: Make sure that … Continue reading

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Exception in thread “AddNode API Thread” java.lang.OutOfMemoryError: Java heap space (#addnode.sh, #RAC, #Java.OutOfMemory)

Issue: I was trying to add a node in RAC environment using the below command; the prerequisites were all met and the copy portion of files was in progress. But, after some time, noticed that files were not being copied … Continue reading

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ORA-17503: ksfdopn:10 Failed to open file, ORA-01017: invalid username/password; logon denied while logging in as sysdba or sysasm (#ORA-01017 #ASM)

Issue: The RAC environment has been migrated to new server with same ips and hostname; post migration, we are seeing below error messages while connecting to ASM instance and the CRS service was not coming up [asmora@hostname dbs]$ sqlplus / … Continue reading

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Importance of OLR (Oracle Local Registry):

A component called “OLR” is introduced in 11gR2, which will be installed on every node of Cluster. This component is not shared by other nodes and is specific to the respective node. OLR will be setup when Oracle Clusterware is … Continue reading

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Oracle Clusterware Concepts

Oracle Clusterware Concepts: Oracle Clusterware is the heart of Oracle RAC Database. Clusterware concepts are very important for a DBA to ride Oracle RAC Databases. The main concepts of Oracle Clusterware are as follows. Oracle Clusterware mainly has 2 components, … Continue reading

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Applying patches to RAC environments (on Linux) in a rolling manner, with zero downtime to applications.

The scope of this post is to apply patches to RAC environments (on Linux) in a rolling manner, with zero downtime to applications. Pre-requisites RAC environment (2 or more nodes) Application should be RAC aware Refer the Note id (756671.1) … Continue reading

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CRS-4404, CRS-4535, CRS-4530, CRS-4534- Cannot communicate with Event Manager

Issue: The Below errors may stop you from Installing or Configuring RAC CRS-4535: Cannot communicate with Cluster Ready Services CRS-4530: Communications failure contacting Cluster Synchronization Services daemon CRS-4534: Cannot communicate with Event Manager CRS-4404: The following nodes did not reply … Continue reading

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