SwaminathanG8419 Member since 2018 5 posts
National Account Service Company
Posted: 1 year ago
Last activity: 1 year 4 months ago

Error while starting Decision Data Store Service in Pega 8.2.1

We recently installed Pega 8.2.1 platform with Pega Customer Service for Healthcare. When we try to start the Decision Data store service from "Decisioning->Infrastructure->Services->Decision Data Store" Landing Page, the service start up fails with Status "JOINING_FAILED". When i clicked on the status message, i see the exception message as "SessionNotAvailableException: Unable to obtain session. Cassandra hasn't been started or is unavailable"

The exception trace itself is as given below. Unable to obtain session. Cassandra hasn't been started or is unavailable
at com.pega.dsm.dnode.api.DdsService.getStartupSession(
at com.pega.dsm.dnode.api.DdsService.access$1600(
at com.pega.dsm.dnode.api.DdsService$DdsStartOperation$2$1.execute(
at com.pega.dsm.dnode.util.OperationWithLock$1.execute(
at com.pega.dsm.dnode.util.OperationWithLock$LockingOperation.couldAcquireLock(
at com.pega.dsm.dnode.util.OperationWithLock$LockingOperation.performLockOperation(
at com.pega.dsm.dnode.util.OperationWithLock$LockingOperation.access$200(
at com.pega.dsm.dnode.util.OperationWithLock.doWithLock(
at com.pega.dsm.dnode.util.OperationWithLock.doWithLock(
at com.pega.dsm.dnode.util.OperationWithLock.doWithLock(
at com.pega.dsm.dnode.impl.prpc.service.ServiceHelper.executeWithLockInternal(

At the of the trace i see this message

at com.pega.dsm.dnode.impl.prpc.PrpcThreadFactory$
Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: / (com.datastax.driver.core.exceptions.TransportException: [/] Cannot connect))
at com.datastax.driver.core.ControlConnection.reconnectInternal(

We have installed Pega 8.2.1 on Websphere with DB2 as the database. Pega 8.2.1 instance is installed within an IBM AIX LPAR that has other Pega 7.2.2 instances runnning. Not sure if that effects, but just wanted to share that information.

Request help on this if someone has faced this issue before, and how we can resolve this.



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