[jira] [Created] (SPARK-21223) Thread-safety issue in FsHistoryProvider

["zenglinxi (JIRA)" <ji...@apache.org>]

zenglinxi created SPARK-21223:
---------------------------------

             Summary: Thread-safety issue in FsHistoryProvider 
                 Key: SPARK-21223
                 URL: https://issues.apache.org/jira/browse/SPARK-21223
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 2.1.1
            Reporter: zenglinxi


Currently, Spark HistoryServer use a HashMap named fileToAppInfo in class FsHistoryProvider to store the map of eventlog path and attemptInfo. 
When use ThreadPool to Replay the log files in the list and merge the list of old applications with new ones, multi thread may update fileToAppInfo at the same time, which may cause Thread-safety issues.
{code:java}
for (file <- logInfos) {
       tasks += replayExecutor.submit(new Runnable {
        override def run(): Unit = mergeApplicationListing(file)
     })
 }
{code}




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