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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10609) Uncaught InvalidEncryptionKeyException during pipeline recovery may abort downstream applications
Date Mon, 11 Jul 2016 17:15:11 GMT
Wei-Chiu Chuang created HDFS-10609:
--------------------------------------

             Summary: Uncaught InvalidEncryptionKeyException during pipeline recovery may
abort downstream applications
                 Key: HDFS-10609
                 URL: https://issues.apache.org/jira/browse/HDFS-10609
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: encryption
    Affects Versions: 2.6.0
         Environment: CDH5.8.0
            Reporter: Wei-Chiu Chuang
            Assignee: Wei-Chiu Chuang


In normal operations, if SASL negotiation fails due to {{InvalidEncryptionKeyException}},
it is typically a benign exception, which is caught and retried :

{code:title=SaslDataTransferServer#doSaslHandshake}
  if (ioe instanceof SaslException &&
      ioe.getCause() != null &&
      ioe.getCause() instanceof InvalidEncryptionKeyException) {
    // This could just be because the client is long-lived and hasn't gotten
    // a new encryption key from the NN in a while. Upon receiving this
    // error, the client will get a new encryption key from the NN and retry
    // connecting to this DN.
    sendInvalidKeySaslErrorMessage(out, ioe.getCause().getMessage());
  } 
{code}

{code:title=DFSOutputStream.DataStreamer#createBlockOutputStream}
if (ie instanceof InvalidEncryptionKeyException && refetchEncryptionKey > 0) {
            DFSClient.LOG.info("Will fetch a new encryption key and retry, " 
                + "encryption key was invalid when connecting to "
                + nodes[0] + " : " + ie);
{code}

However, if the exception is thrown during pipeline recovery, the corresponding code does
not handle it properly, and the exception is spilled out to downstream applications, such
as SOLR, aborting its operation:

{quote}
2016-07-06 12:12:51,992 ERROR org.apache.solr.update.HdfsTransactionLog: Exception closing
tlog.
org.apache.hadoop.hdfs.protocol.datatransfer.InvalidEncryptionKeyException: Can't re-compute
encryption key for nonce, since the required block key (keyID=557709482) doesn't exist. Current
key: 1350592619
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataTransferSaslUtil.readSaslMessageAndNegotiatedCipherOption(DataTransferSaslUtil.java:417)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.doSaslHandshake(SaslDataTransferClient.java:474)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.getEncryptedStreams(SaslDataTransferClient.java:299)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.send(SaslDataTransferClient.java:242)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.checkTrustAndSend(SaslDataTransferClient.java:211)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.socketSend(SaslDataTransferClient.java:183)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:1308)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:1272)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1433)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:1147)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:632)
2016-07-06 12:12:51,997 ERROR org.apache.solr.update.CommitTracker: auto commit error...:org.apache.solr.common.SolrException:
org.apache.hadoop.hdfs.protocol.datatransfer.InvalidEncryptionKeyException: Can't re-compute
encryption key for nonce, since the required block key (keyID=557709482) doesn't exist. Current
key: 1350592619
        at org.apache.solr.update.HdfsTransactionLog.close(HdfsTransactionLog.java:316)
        at org.apache.solr.update.TransactionLog.decref(TransactionLog.java:505)
        at org.apache.solr.update.UpdateLog.addOldLog(UpdateLog.java:380)
        at org.apache.solr.update.UpdateLog.postCommit(UpdateLog.java:676)
        at org.apache.solr.update.DirectUpdateHandler2.commit(DirectUpdateHandler2.java:623)
        at org.apache.solr.update.CommitTracker.run(CommitTracker.java:216)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.hadoop.hdfs.protocol.datatransfer.InvalidEncryptionKeyException: Can't
re-compute encryption key for nonce, since the required block key (keyID=557709482) doesn't
exist. Current key: 1350592619
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataTransferSaslUtil.readSaslMessageAndNegotiatedCipherOption(DataTransferSaslUtil.java:417)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.doSaslHandshake(SaslDataTransferClient.java:474)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.getEncryptedStreams(SaslDataTransferClient.java:299)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.send(SaslDataTransferClient.java:242)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.checkTrustAndSend(SaslDataTransferClient.java:211)
        at org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.socketSend(SaslDataTransferClient.java:183)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:1308)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:1272)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1433)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:1147)
        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:632)
{quote}

This exception should be contained within HDFS, caught and retried just like in {{createBlockOutputStream()}}



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