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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