DDS service in not started
The stack trace from the log :
Exception in thread "ADM_Pulse_Executor_21" com.pega.dsm.dnode.api.dds.service.SessionNotAvailableException: Unable to obtain session. Cassandra hasn't been started or is unavailable at com.pega.dsm.dnode.api.dds.service.CassandraSessionCache.getSession(CassandraSessionCache.java:163) at com.pega.dsm.dnode.api.dds.service.CassandraSessionCache.getSession(CassandraSessionCache.java:188) at com.pega.decision.adm.commitlog.AdmMetaTable.readByPartition(AdmMetaTable.java:144) at com.pega.decision.adm.commitlog.AdmMetaTable.readDataByPartition(AdmMetaTable.java:135) at com.pega.decision.adm.commitlog.AdmMetaTable.readDataFrom(AdmMetaTable.java:130)