AvaticaClientRuntimeException: Remote driver error: NullPointerException: (null exception message). Error -1 (00000) null AvaticaClientRuntimeException: Remote driver error: NullPointerException: (null exception message). Error -1 (00000) null  java.lang.NullPointerException  at org.onap.music.mdbc.mixins.MusicMixin.executeMusicLockedGet(MusicMixin.java:2295)  at org.onap.music.mdbc.mixins.MusicMixin.getMusicRangeDependency(MusicMixin.java:1529)  at org.onap.music.mdbc.mixins.MusicMixin.getRangeDependencies(MusicMixin.java:2101)  at org.onap.music.mdbc.ownership.OwnershipAndCheckpoint.own(OwnershipAndCheckpoint.java:295)  at org.onap.music.mdbc.MdbcConnection.own(MdbcConnection.java:601)

Caused by: java.sql.SQLException: An SQLException was provoked by the following failure: AvaticaClientRuntimeException: Remote driver error: NullPointerException: (null exception message). Error -1 (00000) null Caused by: java.sql.SQLException: An SQLException was provoked by the following failure: AvaticaClientRuntimeException: Remote driver error: NullPointerException: (null exception message). Error -1 (00000) null  java.lang.NullPointerException  at org.onap.music.mdbc.tables.StagingTable.isEmpty(StagingTable.java:245)  at org.onap.music.mdbc.mixins.MusicMixin.commitLog(MusicMixin.java:1315)  at org.onap.music.mdbc.MdbcConnection.commit(MdbcConnection.java:216)  at org.apache.calcite.avatica.jdbc.JdbcMeta.commit(JdbcMeta.java:905)  at org.onap.music.mdbc.MdbcServerLogic.commit(MdbcServerLogic.java:167)  at org.apache.calcite.avatica.remote.LocalService.apply(LocalService.java:330)  at org.apache.calcite.avatica.remote.Service$CommitRequest.accept(Service.java:2715)  at org.apache.calcite.avatica.remote.Service$CommitRequest.accept(Service.java:2701)  at org.apache.calcite.avatica.remote.AbstractHandler.apply(AbstractHandler.java:94)  at org.apache.calcite.avatica.remote.ProtobufHandler.apply(ProtobufHandler.java:46)