[
https://issues.apache.org/jira/browse/RATIS-2179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Tsz-wo Sze resolved RATIS-2179.
-------------------------------
Fix Version/s: 3.2.0
Resolution: Fixed
The pull request is now merged. Thanks, [~nicholasjiang]!
> NullPointerException in RaftServerImpl.getLogInfo
> -------------------------------------------------
>
> Key: RATIS-2179
> URL: https://issues.apache.org/jira/browse/RATIS-2179
> Project: Ratis
> Issue Type: Bug
> Components: server
> Affects Versions: 3.1.1
> Reporter: Nicholas Jiang
> Assignee: Nicholas Jiang
> Priority: Major
> Fix For: 3.2.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> `RaftServerImpl` builds `LogInfoProto` to create `GroupInfoReply` for
> `RaftServer#getGroupInfo` in RATIS-2031, which causes `NullPointerException`
> for null latest snapshot as follows:
> {code:java}
> info] Test
> org.apache.celeborn.service.deploy.master.clustermeta.ha.MasterRatisServerSuiteJ.testIsLeader
> started
> 24/10/24 08:16:30,295 ERROR [pool-1-thread-1] HARaftServer: Failed to
> retrieve RaftPeerRole. Setting cached role to UNRECOGNIZED and resetting
> leader info.
> java.io.IOException: java.lang.NullPointerException
> at org.apache.ratis.util.IOUtils.asIOException(IOUtils.java:56)
> at
> org.apache.ratis.server.impl.RaftServerImpl.waitForReply(RaftServerImpl.java:1148)
> at
> org.apache.ratis.server.impl.RaftServerProxy.getGroupInfo(RaftServerProxy.java:607)
> at
> org.apache.celeborn.service.deploy.master.clustermeta.ha.HARaftServer.getGroupInfo(HARaftServer.java:599)
> at
> org.apache.celeborn.service.deploy.master.clustermeta.ha.HARaftServer.updateServerRole(HARaftServer.java:514)
> at
> org.apache.celeborn.service.deploy.master.clustermeta.ha.HARaftServer.isLeader(HARaftServer.java:489)
> at
> org.apache.celeborn.service.deploy.master.clustermeta.ha.MasterRatisServerSuiteJ.testIsLeader(MasterRatisServerSuiteJ.java:47)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at
> org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
> at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
> at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
> at org.junit.runners.Suite.runChild(Suite.java:128)
> at org.junit.runners.Suite.runChild(Suite.java:27)
> at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
> at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
> at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
> at com.novocode.junit.JUnitTask.execute(JUnitTask.java:64)
> at sbt.ForkMain$Run.lambda$runTest$1(ForkMain.java:414)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:750)
> Caused by: java.lang.NullPointerException
> at
> org.apache.ratis.server.impl.RaftServerImpl.getLogInfo(RaftServerImpl.java:665)
> at
> org.apache.ratis.server.impl.RaftServerImpl.getGroupInfo(RaftServerImpl.java:658)
> at
> org.apache.ratis.server.impl.RaftServerProxy.lambda$getGroupInfoAsync$23(RaftServerProxy.java:613)
> at
> java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:616)
> at
> java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:591)
> at
> java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:457)
> at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
> at
> java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
> at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
> at
> java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:175)
> {code}
> There is a case for `getSnapshotIndexFromStateMachine` that the index of the
> last entry that has been committed is `RaftLog#INVALID_LOG_INDEX` for null
> latest snapshot in `ServerState`, which causes that the segement log entry of
> the latested committed is null. Therefore, `RaftServerImpl` should set
> committed of `LogInfoProto` without `TermIndex` of `INVALID_LOG_INDEX` latest
> committed index for `SegmentedRaftLog` to avoid `NullPointerException`.
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