“Unable to obtain an object lock on “null” & table or view does not exist” after adding Vertical Portal Cluster member

We were getting the below error in the SystemOut.logs  in our newly added WebSpherePortal server during restart and at runtime .

Error:

[6/14/16 14:18:14:404 IST] 00000063 JPAEventlogRe E   Synchronization Failed. Error: Unable to obtain an object lock on “null”.   <openjpa-2.2.3-SNAPSHOT-r422266:1564471 fatal store error> org.apache.openjpa.persistence.OptimisticLockException: Unable to obtain an object lock on “null”.
FailedObject: SELECT V FROM VirtualPortalEntryImpl V WHERE V.VP = :VP [java.lang.String]
at org.apache.openjpa.jdbc.sql.DBDictionary.narrow(DBDictionary.java:4983)
[6/14/16 14:18:15:994 IST] 00000063 ModuleManager E    <openjpa-2.2.3-SNAPSHOT-r422266:1564471 fatal store error> org.apache.openjpa.persistence.OptimisticLockException: Unable to  obtain an object lock on “null [java.lang.String]”.
FailedObject: 0 [org.apache.openjpa.util.IntId] [java.lang.String]

Caused by: org.apache.openjpa.lib.jdbc.ReportingSQLException: ORA-00942: table or view does not exist 
{prepstmnt 1108295475 SELECT t0.VPID FROM jcr.WCM_VPORTALS t0 WHERE t0.VPID = ?} [code=942, state=42000]

Image1

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Background:

It’s a newly created Server with vertical cluster and two Members  ie WebSphere_Portal and WebSphere_Portal_1

1) The Portal Cluster Creation was performed before the DB transfer
2) Second Portal Vertical Cluster member was created after the DB transfer
3) DB Oracle :Schema Names , FDKBUSR,LMDBUSR,RELDBUSR,COMDBUSR,CUSTDBUSR,
JCRDBUSR
4) The error were only displayed in the SystemOut.log for Second Portal Member
“WebSphere_Portal_1”

Steps Taken:

As the logs mentioned some locking errors,

a) I stopped  WebSphere_Portal and just working on “WebSphere_Portal_1” still same error on WebSphere_Portal_1
b) I started WebSphere_Portal_1 first  and then started WebSphere_Portal ..still same error on WebSphere_Portal_1

 On reanalyzing the logs found this entry in the logs of WebSphere_Portal_1

“Caused by: org.apache.openjpa.lib.jdbc.ReportingSQLException: ORA-00942: table or view does not exist
{prepstmnt 1108295475 SELECT t0.VPID FROM jcr.WCM_VPORTALS t0 WHERE t0.VPID = ?} [code=942, state=42000]”

>>Our schema for JCRDB is JCRDBUSR whereas in the error  its referring to “SELECT t0.VPID FROM jcr.WCM_VPORTALS t0 WHERE t0.VPID = ?}”

Also this table didn’t exist in the Database

So it seems  “WebSphere_Portal_1” was somehow referring to the default schema instead of the one configured for the Cluster

Solution :

On checking the WebSphere Variable Under Scope : Node : Nodename and Server = ServerName

Ie Scope : Node : NodeName and Server : WebSphere_Portal_1

 Here the Variable  for WebSphere_Portal_1

WCM_Schema : jcr
WCM_DATASOURCE= jdbc/wpdbDS

 These were the default settings but those details were  not as per our environment

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Comparing with same variables from WebSphere_Portal for these parameters

For WebSphere_Portal the variables were :
WCM_Schema : JCRDBUSR
WCM_DATASOURCE= jdbc/wpdbDS_jcr
WCM_PORT=10028

I changed the Websphere Variable for Node : NodeName and Server : WebSphere_Portal_1 from

 WCM_Schema : jcr
WCM_DATASOURCE= jdbc/wpdbDS
WCM_PORT=10028

To

WCM_Schema : JCRDBUSR
WCM_DATASOURCE= jdbc/wpdbDS_jcr
WCM_PORT=10103

 

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>>Sync the config and Save the changes
>>Restart the  Portal Servers

This resolved the Errors from the logs and we were able to login and access the portal url of WebSphere_Portal_1

Additional Link:

Later found this link which mentions to make those changes if “transferred your databases after you created the cluster, “

https://www.ibm.com/support/knowledgecenter/SSHRKX_8.5.0/mp/install/add_vert_clus.html

 “ If you transferred your databases after you created the cluster, complete the following steps on each vertical cluster member:

  1. Log on to the deployment manager WebSphere Integrated Solutions Console.
  2. Go to Environment > WebSphere Variables.
  3. From the Scope menu, select the Node=nodename, Server=servername option to narrow the scope of the listed variables. Node=nodename is the node that contains the WebSphere Portal application server.
  4. Update the WCM_DATASOURCE variable with the JCR data source name. Create the variable in the jdbc/jcr.DataSourceName format. For example, jdbc/wpdbds_jcr.
  5. Save all changes and synchronize the nodes.

 

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