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https://issues.apache.org/jira/browse/SPARK-10878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15989526#comment-15989526
]
Jeeyoung Kim commented on SPARK-10878:
--------------------------------------
Can't we fix the race condition, at least for the pom-submitting part if we
override the function
{{noformat}}
/** A nice function to use in tests as well. Values are dummy strings. */
def getModuleDescriptor: DefaultModuleDescriptor =
DefaultModuleDescriptor.newDefaultInstance(
ModuleRevisionId.newInstance("org.apache.spark", "spark-submit-parent",
"1.0"))
{{noformat}}
to generate random strings?
> Race condition when resolving Maven coordinates via Ivy
> -------------------------------------------------------
>
> Key: SPARK-10878
> URL: https://issues.apache.org/jira/browse/SPARK-10878
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.5.0
> Reporter: Ryan Williams
> Priority: Minor
>
> I've recently been shell-scripting the creation of many concurrent
> Spark-on-YARN apps and observing a fraction of them to fail with what I'm
> guessing is a race condition in their Maven-coordinate resolution.
> For example, I might spawn an app for each path in file {{paths}} with the
> following shell script:
> {code}
> cat paths | parallel "$SPARK_HOME/bin/spark-submit foo.jar {}"
> {code}
> When doing this, I observe some fraction of the spawned jobs to fail with
> errors like:
> {code}
> :: retrieving :: org.apache.spark#spark-submit-parent
> confs: [default]
> Exception in thread "main" java.lang.RuntimeException: problem during
> retrieve of org.apache.spark#spark-submit-parent: java.text.ParseException:
> failed to parse report:
> /hpc/users/willir31/.ivy2/cache/org.apache.spark-spark-submit-parent-default.xml:
> Premature end of file.
> at
> org.apache.ivy.core.retrieve.RetrieveEngine.retrieve(RetrieveEngine.java:249)
> at
> org.apache.ivy.core.retrieve.RetrieveEngine.retrieve(RetrieveEngine.java:83)
> at org.apache.ivy.Ivy.retrieve(Ivy.java:551)
> at
> org.apache.spark.deploy.SparkSubmitUtils$.resolveMavenCoordinates(SparkSubmit.scala:1006)
> at
> org.apache.spark.deploy.SparkSubmit$.prepareSubmitEnvironment(SparkSubmit.scala:286)
> at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:153)
> at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:120)
> at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
> Caused by: java.text.ParseException: failed to parse report:
> /hpc/users/willir31/.ivy2/cache/org.apache.spark-spark-submit-parent-default.xml:
> Premature end of file.
> at
> org.apache.ivy.plugins.report.XmlReportParser.parse(XmlReportParser.java:293)
> at
> org.apache.ivy.core.retrieve.RetrieveEngine.determineArtifactsToCopy(RetrieveEngine.java:329)
> at
> org.apache.ivy.core.retrieve.RetrieveEngine.retrieve(RetrieveEngine.java:118)
> ... 7 more
> Caused by: org.xml.sax.SAXParseException; Premature end of file.
> at
> org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown
> Source)
> at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown
> Source)
> at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
> {code}
> The more apps I try to launch simultaneously, the greater fraction of them
> seem to fail with this or similar errors; a batch of ~10 will usually work
> fine, a batch of 15 will see a few failures, and a batch of ~60 will have
> dozens of failures.
> [This gist shows 11 recent failures I
> observed|https://gist.github.com/ryan-williams/648bff70e518de0c7c84].
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