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https://issues.apache.org/jira/browse/HDDS-13000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17950396#comment-17950396
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Wei-Chiu Chuang commented on HDDS-13000:
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It doesn't fail the client because a client side check:
https://github.com/apache/ozone/blob/7e675d743ab3d22a7f722e9b3c3c425c82db8bb1/hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/protocolPB/OzoneManagerProtocolClientSideTranslatorPB.java#L1469
> [Snapshot] listSnapshotDiffJobs throws NPE
> ------------------------------------------
>
> Key: HDDS-13000
> URL: https://issues.apache.org/jira/browse/HDDS-13000
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Snapshot
> Affects Versions: 2.1.0
> Reporter: Wei-Chiu Chuang
> Priority: Major
>
> {noformat}
> 2025-05-08 16:30:46,040 [IPC Server handler 17 on default port 15006] WARN
> ipc.Server (Server.java:logException(3258)) - IPC Server handler 17 on
> default port 15006, call Call#39 Retry#0
> org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest from
> 127.0.0.1:60015
> java.lang.NullPointerException: Cannot invoke
> "org.apache.hadoop.ozone.snapshot.SnapshotDiffResponse$SubStatus.toProtoBuf()"
> because "this.subStatus" is null
> at
> org.apache.hadoop.ozone.om.helpers.SnapshotDiffJob.toProtoBuf(SnapshotDiffJob.java:272)
> at
> org.apache.hadoop.ozone.protocolPB.OzoneManagerRequestHandler.listSnapshotDiffJobs(OzoneManagerRequestHandler.java:1456)
> at
> org.apache.hadoop.ozone.protocolPB.OzoneManagerRequestHandler.handleReadRequest(OzoneManagerRequestHandler.java:348)
> at
> org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitReadRequestToOM(OzoneManagerProtocolServerSideTranslatorPB.java:191)
> at
> org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.internalProcessRequest(OzoneManagerProtocolServerSideTranslatorPB.java:158)
> at
> org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.processRequest(OzoneManagerProtocolServerSideTranslatorPB.java:124)
> at
> org.apache.hadoop.hdds.server.OzoneProtocolMessageDispatcher.processRequest(OzoneProtocolMessageDispatcher.java:87)
> at
> org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitRequest(OzoneManagerProtocolServerSideTranslatorPB.java:115)
> at
> org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos$OzoneManagerService$2.callBlockingMethod(OzoneManagerProtocolProtos.java)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server.processCall(ProtobufRpcEngine.java:484)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine2.java:595)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine2$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine2.java:573)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1227)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1246)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:1169)
> at
> java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
> at java.base/javax.security.auth.Subject.doAs(Subject.java:439)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1953)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:3198)
> {noformat}
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