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https://issues.apache.org/jira/browse/SPARK-30313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17003470#comment-17003470
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Jungtaek Lim commented on SPARK-30313:
--------------------------------------
Similar test failure:
[https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/115700/testReport/]
> Flaky test: MasterSuite.master/worker web ui available with reverseProxy
> ------------------------------------------------------------------------
>
> Key: SPARK-30313
> URL: https://issues.apache.org/jira/browse/SPARK-30313
> Project: Spark
> Issue Type: Bug
> Components: Tests
> Affects Versions: 3.0.0
> Reporter: Marcelo Masiero Vanzin
> Priority: Major
>
> Saw this test fail a few times on PRs. e.g.:
> [https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/115583/testReport/org.apache.spark.deploy.master/MasterSuite/master_worker_web_ui_available_with_reverseProxy/]
>
> {noformat}
> Error Message
> org.scalatest.exceptions.TestFailedDueToTimeoutException: The code passed to
> eventually never returned normally. Attempted 43 times over
> 5.0642265779999995 seconds. Last failure message: Server returned HTTP
> response code: 500 for URL:
> http://localhost:45395/proxy/worker-20191219134839-localhost-36054/json/.
> Stacktrace
> sbt.ForkMain$ForkError:
> org.scalatest.exceptions.TestFailedDueToTimeoutException: The code passed to
> eventually never returned normally. Attempted 43 times over
> 5.0642265779999995 seconds. Last failure message: Server returned HTTP
> response code: 500 for URL:
> http://localhost:45395/proxy/worker-20191219134839-localhost-36054/json/.
> at
> org.scalatest.concurrent.Eventually.tryTryAgain$1(Eventually.scala:432)
> at org.scalatest.concurrent.Eventually.eventually(Eventually.scala:439)
> at org.scalatest.concurrent.Eventually.eventually$(Eventually.scala:391)
> at
> org.apache.spark.deploy.master.MasterSuite.eventually(MasterSuite.scala:111)
> at org.scalatest.concurrent.Eventually.eventually(Eventually.scala:308)
> at org.scalatest.concurrent.Eventually.eventually$(Eventually.scala:307)
> at
> org.apache.spark.deploy.master.MasterSuite.eventually(MasterSuite.scala:111)
> at
> org.apache.spark.deploy.master.MasterSuite.$anonfun$new$14(MasterSuite.scala:318)
> at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
> ---
> Caused by: sbt.ForkMain$ForkError: java.io.IOException: Server returned HTTP
> response code: 500 for URL:
> http://localhost:45395/proxy/worker-20191219134839-localhost-36054/json/
> at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
> at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
> at java.net.URL.openStream(URL.java:1045)
> at scala.io.Source$.fromURL(Source.scala:144)
> at scala.io.Source$.fromURL(Source.scala:134)
> {noformat}
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