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Posted to issues@spark.apache.org by "Derrick Burns (JIRA)" <ji...@apache.org> on 2014/12/21 03:20:13 UTC
[jira] [Commented] (SPARK-2677) BasicBlockFetchIterator#next can
wait forever
[ https://issues.apache.org/jira/browse/SPARK-2677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14255009#comment-14255009 ]
Derrick Burns commented on SPARK-2677:
--------------------------------------
Appear to still happen in 1.1.1:
2014-12-20 22:54:00,574 INFO [connection-manager-thread] network.ConnectionManager (Logging.scala:logInfo(59)) - Key not valid ? sun.nio.ch.SelectionKeyImpl@6045fa68
2014-12-20 22:54:00,574 INFO [handle-read-write-executor-0] network.ConnectionManager (Logging.scala:logInfo(59)) - Removing SendingConnection to ConnectionManagerId(ip-10-89-134-186.us-west-2.compute.internal,49171)
2014-12-20 22:54:00,574 INFO [handle-read-write-executor-2] network.ConnectionManager (Logging.scala:logInfo(59)) - Removing ReceivingConnection to ConnectionManagerId(ip-10-89-134-186.us-west-2.compute.internal,49171)
2014-12-20 22:54:00,575 INFO [sparkDriver-akka.actor.default-dispatcher-14] cluster.YarnClientSchedulerBackend (Logging.scala:logInfo(59)) - Executor 7 disconnected, so removing it
2014-12-20 22:54:00,576 ERROR [handle-read-write-executor-2] network.ConnectionManager (Logging.scala:logError(75)) - Corresponding SendingConnection to ConnectionManagerId(ip-10-89-134-186.us-west-2.compute.internal,49171) not found
2014-12-20 22:54:00,576 ERROR [sparkDriver-akka.actor.default-dispatcher-14] cluster.YarnClientClusterScheduler (Logging.scala:logError(75)) - Lost executor 7 on ip-10-89-134-186.us-west-2.compute.internal: remote Akka client disassociated
2014-12-20 22:54:00,576 INFO [connection-manager-thread] network.ConnectionManager (Logging.scala:logInfo(80)) - key already cancelled ? sun.nio.ch.SelectionKeyImpl@6045fa68
java.nio.channels.CancelledKeyException
at org.apache.spark.network.ConnectionManager.run(ConnectionManager.scala:392)
at org.apache.spark.network.ConnectionManager$$anon$4.run(ConnectionManager.scala:145)
> BasicBlockFetchIterator#next can wait forever
> ---------------------------------------------
>
> Key: SPARK-2677
> URL: https://issues.apache.org/jira/browse/SPARK-2677
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 0.9.2, 1.0.0, 1.0.1
> Reporter: Kousuke Saruta
> Assignee: Kousuke Saruta
> Priority: Blocker
> Fix For: 1.1.0
>
>
> In BasicBlockFetchIterator#next, it waits fetch result on result.take.
> {code}
> override def next(): (BlockId, Option[Iterator[Any]]) = {
> resultsGotten += 1
> val startFetchWait = System.currentTimeMillis()
> val result = results.take()
> val stopFetchWait = System.currentTimeMillis()
> _fetchWaitTime += (stopFetchWait - startFetchWait)
> if (! result.failed) bytesInFlight -= result.size
> while (!fetchRequests.isEmpty &&
> (bytesInFlight == 0 || bytesInFlight + fetchRequests.front.size <= maxBytesInFlight)) {
> sendRequest(fetchRequests.dequeue())
> }
> (result.blockId, if (result.failed) None else Some(result.deserialize()))
> }
> {code}
> But, results is implemented as LinkedBlockingQueue so if remote executor hang up, fetching Executor waits forever.
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