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https://issues.apache.org/jira/browse/SPARK-22778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16289822#comment-16289822
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Yinan Li edited comment on SPARK-22778 at 12/13/17 8:24 PM:
------------------------------------------------------------
Just some background on this. The validation and parsing of k8s master url has
been moved to SparkSubmit as being suggested in the review. The parsed master
URL (https://... for example) is appended a {{k8s}} prefix after the parsing to
satisfy {{KubernetesClusterManager}}, whose {{canCreate}} method is based on if
the master URL starts {{k8s}}. That's why you see the {{k8s:}} prefix. The
issue seems that in the driver pod {{SparkContext}} could not find
{{KubernetesClusterManager}} based on the debug messages I added. The code that
triggered the error (with the debugging I added) is as follows:
{code:java}
private def getClusterManager(url: String): Option[ExternalClusterManager] = {
val loader = Utils.getContextOrSparkClassLoader
val serviceLoaders =
ServiceLoader.load(classOf[ExternalClusterManager], loader).asScala
serviceLoaders.foreach { loader =>
logInfo(s"Found the following external cluster manager: $loader")
}
val filteredServiceLoaders = serviceLoaders.filter(_.canCreate(url))
if (filteredServiceLoaders.size > 1) {
throw new SparkException(
s"Multiple external cluster managers registered for the url $url:
$serviceLoaders")
} else if (filteredServiceLoaders.isEmpty) {
logWarning(s"No external cluster manager registered for url $url")
}
filteredServiceLoaders.headOption
}
{code}
And I got the following:
{code:java}
No external cluster manager registered for url k8s:https://35.226.8.173
{code}
was (Author: liyinan926):
Just some background on this. The validation and parsing of k8s master url has
been moved to SparkSubmit as being suggested in the review. The parsed master
URL (https://... for example) is appended a {{k8s}} prefix after the parsing to
satisfy {{KubernetesClusterManager}}, whose {{canCreate}} method is based on if
the master URL starts {{k8s}}. That's why you see the {{k8s:}} prefix. The
issue seems that in the driver pod {{SparkContext}} could not find
{{KubernetesClusterManager}} based on the debug messages I added:
{code:scala}
private def getClusterManager(url: String): Option[ExternalClusterManager] = {
val loader = Utils.getContextOrSparkClassLoader
val serviceLoaders =
ServiceLoader.load(classOf[ExternalClusterManager], loader).asScala
serviceLoaders.foreach { loader =>
logInfo(s"Found the following external cluster manager: $loader")
}
val filteredServiceLoaders = serviceLoaders.filter(_.canCreate(url))
if (filteredServiceLoaders.size > 1) {
throw new SparkException(
s"Multiple external cluster managers registered for the url $url:
$serviceLoaders")
} else if (filteredServiceLoaders.isEmpty) {
logWarning(s"No external cluster manager registered for url $url")
}
filteredServiceLoaders.headOption
}
{code}
And I got the following:
{code:java}
No external cluster manager registered for url k8s:https://35.226.8.173
{code}
> Kubernetes scheduler at master failing to run applications successfully
> -----------------------------------------------------------------------
>
> Key: SPARK-22778
> URL: https://issues.apache.org/jira/browse/SPARK-22778
> Project: Spark
> Issue Type: Bug
> Components: Kubernetes
> Affects Versions: 2.3.0
> Reporter: Anirudh Ramanathan
>
> Building images based on master and deploying Spark PI results in the
> following error.
> 2017-12-13 19:57:19 INFO SparkContext:54 - Successfully stopped SparkContext
> Exception in thread "main" org.apache.spark.SparkException: Could not parse
> Master URL: 'k8s:https://xx.yy.zz.ww'
> at
> org.apache.spark.SparkContext$.org$apache$spark$SparkContext$$createTaskScheduler(SparkContext.scala:2741)
> at org.apache.spark.SparkContext.<init>(SparkContext.scala:496)
> at org.apache.spark.SparkContext$.getOrCreate(SparkContext.scala:2490)
> at
> org.apache.spark.sql.SparkSession$Builder$$anonfun$7.apply(SparkSession.scala:927)
> at
> org.apache.spark.sql.SparkSession$Builder$$anonfun$7.apply(SparkSession.scala:918)
> at scala.Option.getOrElse(Option.scala:121)
> at
> org.apache.spark.sql.SparkSession$Builder.getOrCreate(SparkSession.scala:918)
> at org.apache.spark.examples.SparkPi$.main(SparkPi.scala:31)
> at org.apache.spark.examples.SparkPi.main(SparkPi.scala)
> 2017-12-13 19:57:19 INFO ShutdownHookManager:54 - Shutdown hook called
> 2017-12-13 19:57:19 INFO ShutdownHookManager:54 - Deleting directory
> /tmp/spark-b47515c2-6750-4a37-aa68-6ee12da5d2bd
> This is likely an artifact seen because of changes in master, or our
> submission code in the reviews. We haven't seen this on our fork. Hopefully
> once integration tests are ported against upstream/master, we will catch
> these issues earlier.
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