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https://issues.apache.org/jira/browse/SPARK-21447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16091834#comment-16091834
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Apache Spark commented on SPARK-21447:
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User 'ericvandenbergfb' has created a pull request for this issue:
https://github.com/apache/spark/pull/18673
> Spark history server fails to render compressed inprogress history file in
> some cases.
> --------------------------------------------------------------------------------------
>
> Key: SPARK-21447
> URL: https://issues.apache.org/jira/browse/SPARK-21447
> Project: Spark
> Issue Type: Bug
> Components: Web UI
> Affects Versions: 2.0.0
> Environment: Spark History Server
> Reporter: Eric Vandenberg
> Priority: Minor
>
> We've observed the Spark History Server sometimes fails to load event data
> from a compressed .inprogress spark history file. Note the existing logic in
> ReplayListenerBus is to read each line, if it can't json parse the last line
> and it's inprogress (maybeTruncated) then it is accepted as best effort.
> In the case of compressed files, the output stream will compress on the fly
> json serialized event data. The output is periodically flushed to disk when
> internal buffers are full. A consequence of that is a partially compressed
> frame may be flushed, and not being a complete frame, it can not be
> decompressed. If the spark history server attempts to read such an
> .inprogress compressed file it will throw an EOFException. This is really
> analogous to the case of failing to json parse the last line in the file
> (because the full line was not flushed), the difference is that since the
> file is compressed it is possible the compression frame was not flushed, and
> trying to decompress a partial frame fails in a different way the code
> doesn't currently handle.
> 17/07/13 17:24:59 ERROR FsHistoryProvider: Exception encountered when
> attempting to load application log
> hdfs://********/user/hadoop/******/spark/logs/job_**********-*************-*****.lz4.inprogress
> java.io.EOFException: Stream ended prematurely
> at
> org.apache.spark.io.LZ4BlockInputStream.readFully(LZ4BlockInputStream.java:230)
> at
> org.apache.spark.io.LZ4BlockInputStream.refill(LZ4BlockInputStream.java:203)
> at
> org.apache.spark.io.LZ4BlockInputStream.read(LZ4BlockInputStream.java:125)
> at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
> at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
> at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
> at java.io.InputStreamReader.read(InputStreamReader.java:184)
> at java.io.BufferedReader.fill(BufferedReader.java:161)
> at java.io.BufferedReader.readLine(BufferedReader.java:324)
> at java.io.BufferedReader.readLine(BufferedReader.java:389)
> at
> scala.io.BufferedSource$BufferedLineIterator.hasNext(BufferedSource.scala:72)
> at scala.collection.Iterator$$anon$21.hasNext(Iterator.scala:836)
> at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:461)
> at
> org.apache.spark.scheduler.ReplayListenerBus.replay(ReplayListenerBus.scala:66)
> at
> org.apache.spark.deploy.history.FsHistoryProvider.org$apache$spark$deploy$history$FsHistoryProvider$$replay(FsHistoryProvider.scala:601)
> at
> org.apache.spark.deploy.history.FsHistoryProvider.org$apache$spark$deploy$history$FsHistoryProvider$$mergeApplicationListing(FsHistoryProvider.scala:409)
> at
> org.apache.spark.deploy.history.FsHistoryProvider$$anonfun$checkForLogs$3$$anon$4.run(FsHistoryProvider.scala:310)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
>
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