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https://issues.apache.org/jira/browse/HDFS-14942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16968416#comment-16968416
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Ayush Saxena commented on HDFS-14942:
-------------------------------------
v004 LGTM +1
> Change Log Level to debug in JournalNodeSyncer#syncWithJournalAtIndex
> ---------------------------------------------------------------------
>
> Key: HDFS-14942
> URL: https://issues.apache.org/jira/browse/HDFS-14942
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Lisheng Sun
> Assignee: Lisheng Sun
> Priority: Minor
> Attachments: HDFS-14942.001.patch, HDFS-14942.002.patch,
> HDFS-14942.003.patch, HDFS-14942.004.patch
>
>
> when hadoop 2.x upgrades to hadoop 3.x, InterQJournalProtocol is newly
> added，so throw Unknown protocol.
> the newly InterQJournalProtocol is used to sychronize past log segments to
> JNs that missed them. And that an error occurs does not affect normal
> service. I think it should not be a ERROR log，and that log a warn log is more
> reasonable.
> {code:java}
> private void syncWithJournalAtIndex(int index) {
> ...
> GetEditLogManifestResponseProto editLogManifest;
> try {
> editLogManifest = jnProxy.getEditLogManifestFromJournal(jid,
> nameServiceId, 0, false);
> } catch (IOException e) {
> LOG.error("Could not sync with Journal at " +
> otherJNProxies.get(journalNodeIndexForSync), e);
> return;
> }
> {code}
> {code:java}
> 2019-10-30,15:11:17,388 ERROR
> org.apache.hadoop.hdfs.qjournal.server.JournalNodeSyncer: Could not sync with
> Journal at mos1-hadoop-prc-ct17.ksru/10.85.3.59:111002019-10-30,15:11:17,388
> ERROR org.apache.hadoop.hdfs.qjournal.server.JournalNodeSyncer: Could not
> sync with Journal at
> mos1-hadoop-prc-ct17.ksru/10.85.3.59:11100org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.authorize.AuthorizationException):
> Unknown protocol:
> org.apache.hadoop.hdfs.qjournal.protocol.InterQJournalProtocol
> at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1565)
> at org.apache.hadoop.ipc.Client.call(Client.java:1511)
> at org.apache.hadoop.ipc.Client.call(Client.java:1421)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:228)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
> at com.sun.proxy.$Proxy16.getEditLogManifestFromJournal(Unknown Source)
> at
> org.apache.hadoop.hdfs.qjournal.protocolPB.InterQJournalProtocolTranslatorPB.getEditLogManifestFromJournal(InterQJournalProtocolTranslatorPB.java:75)
> at
> org.apache.hadoop.hdfs.qjournal.server.JournalNodeSyncer.syncWithJournalAtIndex(JournalNodeSyncer.java:250)
> at
> org.apache.hadoop.hdfs.qjournal.server.JournalNodeSyncer.syncJournals(JournalNodeSyncer.java:226)
> at
> org.apache.hadoop.hdfs.qjournal.server.JournalNodeSyncer.lambda$startSyncJournalsDaemon$0(JournalNodeSyncer.java:186)
> at java.lang.Thread.run(Thread.java:748)
> {code}
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