2019-11-26T16:10:33,103 | WARN  | pool-73-thread-1 | TopologyStatsProviderImpl        | 267 - org.opendaylight.bgpcep.pcep-topology-stats - 0.10.1 | Failed to prepare Tx for BGP stats update
java.lang.NullPointerException: null
        at org.opendaylight.bgpcep.pcep.topology.provider.session.stats.SessionStateImpl.getMessages(SessionStateImpl.java:139) [265:org.opendaylight.bgpcep.pcep-topology-provider:0.10.1]
        at org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.stats.rev171113.pcep.session.state.grouping.PcepSessionStateBuilder.<init>(PcepSessionStateBuilder.java:49) [257:org.opendaylight.bgpcep.pcep-api:0.10.1]
        at org.opendaylight.bgpcep.pcep.topology.stats.provider.TopologyStatsProviderImpl.updatePcepStats(TopologyStatsProviderImpl.java:85) [267:org.opendaylight.bgpcep.pcep-topology-stats:0.10.1]
        at org.opendaylight.bgpcep.pcep.topology.stats.provider.TopologyStatsProviderImpl.access$000(TopologyStatsProviderImpl.java:46) [267:org.opendaylight.bgpcep.pcep-topology-stats:0.10.1]
        at org.opendaylight.bgpcep.pcep.topology.stats.provider.TopologyStatsProviderImpl$1.run(TopologyStatsProviderImpl.java:70) [267:org.opendaylight.bgpcep.pcep-topology-stats:0.10.1]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:?]
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [?:?]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [?:?]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:?]
        at java.lang.Thread.run(Thread.java:748) [?:?]