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https://issues.apache.org/jira/browse/SPARK-20521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15988342#comment-15988342
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Apache Spark commented on SPARK-20521:
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User 'guoxiaolongzte' has created a pull request for this issue:
https://github.com/apache/spark/pull/17798
> The default of 'spark.worker.cleanup.appDataTtl' should be 604800 in
> spark-standalone.md.
> -------------------------------------------------------------------------------------------
>
> Key: SPARK-20521
> URL: https://issues.apache.org/jira/browse/SPARK-20521
> Project: Spark
> Issue Type: Bug
> Components: Spark Core, Web UI
> Affects Versions: 2.1.0
> Reporter: guoxiaolongzte
> Priority: Minor
>
> Currently, our project needs to be set to clean up the worker directory
> cleanup cycle is three days.
> When I follow http://spark.apache.org/docs/latest/spark-standalone.html,
> configure the 'spark.worker.cleanup.appDataTtl' parameter, I configured to 3
> * 24 * 3600.
> When I start the spark service, the startup fails, and the worker log
> displays the error log as follows:
> 2017-04-28 15:02:03,306 INFO Utils: Successfully started service
> 'sparkWorker' on port 48728.
> Exception in thread "main" java.lang.NumberFormatException: For input string:
> "3 * 24 * 3600"
> at
> java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
> at java.lang.Long.parseLong(Long.java:430)
> at java.lang.Long.parseLong(Long.java:483)
> at scala.collection.immutable.StringLike$class.toLong(StringLike.scala:276)
> at scala.collection.immutable.StringOps.toLong(StringOps.scala:29)
> at org.apache.spark.SparkConf$$anonfun$getLong$2.apply(SparkConf.scala:380)
> at org.apache.spark.SparkConf$$anonfun$getLong$2.apply(SparkConf.scala:380)
> at scala.Option.map(Option.scala:146)
> at org.apache.spark.SparkConf.getLong(SparkConf.scala:380)
> at org.apache.spark.deploy.worker.Worker.(Worker.scala:100)
> at
> org.apache.spark.deploy.worker.Worker$.startRpcEnvAndEndpoint(Worker.scala:730)
> at org.apache.spark.deploy.worker.Worker$.main(Worker.scala:709)
> at org.apache.spark.deploy.worker.Worker.main(Worker.scala)
> Because we put 7 * 24 * 3600 as a string, forced to convert to the dragon
> type, will lead to problems in the program.
> So I think the default value of the current configuration should be a
> specific long value, rather than 7 * 24 * 3600,should be 604800. Because it
> would mislead users for similar configurations, resulting in spark start
> failure.
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