dlmarion opened a new issue, #2669:
URL: https://github.com/apache/accumulo/issues/2669
**Describe the bug**
The CompactionCoordinator (CC) iterates over the TabletServers (TS) to get
information about the compactions. If the CC asks the TS about this before the
TS has finished starting up, then a NPE is logged in the TS log.
```
java.lang.NullPointerException: null
at
org.apache.accumulo.tserver.TabletClientHandler.getCompactionQueueInfo(TabletClientHandler.java:1367)
~[accumulo-tserver-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
Method) ~[?:?]
at
jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
~[?:?]
at
jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at
org.apache.accumulo.core.trace.TraceUtil.lambda$wrapService$0(TraceUtil.java:206)
~[accumulo-core-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at com.sun.proxy.$Proxy58.getCompactionQueueInfo(Unknown Source)
~[?:?]
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Processor$getCompactionQueueInfo.getResult(TabletClientService.java:3159)
~[accumulo-core-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Processor$getCompactionQueueInfo.getResult(TabletClientService.java:3138)
~[accumulo-core-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
```
A corresponding warning is printed in the CC log:
```
2022-05-02T15:17:36,159 [coordinator.CompactionCoordinator] WARN : Error
getting external compaction summaries from tablet server: 1.2.3.4:9997
org.apache.thrift.TApplicationException: Internal error processing
getCompactionQueueInfo
at
org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:79)
~[libthrift-0.15.0.jar:0.15.0]
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Client.recv_getCompactionQueueInfo(TabletClientService.java:879)
~[accumulo-core-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at
org.apache.accumulo.core.tabletserver.thrift.TabletClientService$Client.getCompactionQueueInfo(TabletClientService.java:865)
~[accumulo-core-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
at
org.apache.accumulo.coordinator.CompactionCoordinator.updateSummaries(CompactionCoordinator.java:359)
~[accumulo-compaction-coordinator-2.1.0-SNAPSHOT.jar:2.1.0-SNAPSHOT]
```
It looks like we might be able to move the start of the ThriftServer to a
point in `TabletServer.run` after the compactionManager variable has been set.
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