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https://issues.apache.org/jira/browse/HDDS-2985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17742144#comment-17742144
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Attila Doroszlai commented on HDDS-2985:
----------------------------------------
Based on the date this bug was reported, {{HddsDispatcher}} probably looked
like this:
{code:title=https://github.com/apache/ozone/blob/650678928c0f8032a3935757884e20710eebc775/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/impl/HddsDispatcher.java#L223-L228}
223 │ Preconditions.checkNotNull(container2BCSIDMap);
224 │ if (container2BCSIDMap.get(containerID) == null) {
225 │ container2BCSIDMap
226 │ .put(containerID, container.getBlockCommitSequenceId());
227 │ containerSet.getMissingContainerSet().remove(containerID);
228 │ }
{code}
Only {{container}} could have been null, and null check for that was added in
HDDS-3115.
> When changing ratis code with not wait for WSMD future got NPE with no clear
> exception
> --------------------------------------------------------------------------------------
>
> Key: HDDS-2985
> URL: https://issues.apache.org/jira/browse/HDDS-2985
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Bharat Viswanadham
> Assignee: George Jahad
> Priority: Major
> Labels: teragentest
>
>
> {code:java}
> 2020-02-05 14:18:45,975 ERROR
> org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine:
> gid group-4736BBD10AF6 : ApplyTransaction failed. cmd WriteChunk logIndex 15
> exception {} java.lang.NullPointerException at
> org.apache.hadoop.ozone.container.common.impl.HddsDispatcher.dispatchRequest(HddsDispatcher.java:226)
> at
> org.apache.hadoop.ozone.container.common.impl.HddsDispatcher.dispatch(HddsDispatcher.java:162)
> at
> org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.dispatchCommand(ContainerStateMachine.java:396)
> at
> org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.runCommand(ContainerStateMachine.java:406)
> at
> org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.lambda$applyTransaction$6(ContainerStateMachine.java:745)
> at
> java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748) 2020-02-05 14:18:45,975 ERROR
> org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine:
> gid group-4736BBD10AF6 : ApplyTransaction failed. cmd WriteChunk logIndex 17
> exception {} java.lang.NullPointerException at
> org.apache.hadoop.ozone.container.common.impl.HddsDispatcher.dispatchRequest(HddsDispatcher.java:226)
> at
> org.apache.hadoop.ozone.container.common.impl.HddsDispatcher.dispatch(HddsDispatcher.java:162)
> at
> org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.dispatchCommand(ContainerStateMachine.java:396)
> at
> org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.runCommand(ContainerStateMachine.java:406)
> at
> org.apache.hadoop.ozone.container.common.transport.server.ratis.ContainerStateMachine.lambda$applyTransaction$6(ContainerStateMachine.java:745)
> at
> java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
> 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) {code}
>
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