[JIRA] (JENKINS-39529) OutOfMemoryError when viewing and/or recording test results

[erik.bra...@gmx.de (JIRA)]

Title: Message Title

Erik Brangs created an issue   Jenkins / JENKINS-39529 OutOfMemoryError when viewing and/or recording test results Issue Type: Bug Assignee: Unassigned Attachments: thread-stack-edited.txt Components: junit-plugin Created: 2016/Nov/05 1:24 PM Environment: Ubuntu 12.04 LTS Jenkins LTS ver. 2.19.1 (now upgraded to Jenkins ver. 2.19.2) Java 7 Priority: Minor Reporter: Erik Brangs Test setup Our team is using Jenkins LTS to display test results from our project. The results are displayed using the JUnit test format but the results aren't from JUnit tests. They're from a custom XML format that's transformed to the one used by Jenkins JUnit using XSLT. In contrast to standard JUnit tests, almost every one of our tests has output. We currently don't discard any old builds and we archive the test results. Workaround? I suppose we could try to delete old test results. Problem OOMEs occur from time to time, e.g. when recording test results or viewing test reports. A stack trace from an example OOME from the Jenkins log looks like this: Failed to load /home/regression/jenkins/jobs/x86-sanity-main-repo/builds/358/junitResult.xml java.io.IOException: Unable to read /home/regression/jenkins/jobs/x86-sanity-main-repo/builds/358/junitResult.xml at hudson.XmlFile.read(XmlFile.java:146) at hudson.tasks.junit.TestResultAction.load(TestResultAction.java:206) at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:136) at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:62) at hudson.tasks.test.AbstractTestResultAction.findCorrespondingResult(AbstractTestResultAction.java:248) [next part repeats a lot of times] at hudson.tasks.test.TestResult.getPreviousResult(TestResult.java:142) at hudson.tasks.junit.SuiteResult.getPreviousResult(SuiteResult.java:283) at hudson.tasks.junit.CaseResult.getPreviousResult(CaseResult.java:446) at hudson.tasks.junit.CaseResult.freeze(CaseResult.java:575) at hudson.tasks.junit.SuiteResult.freeze(SuiteResult.java:325) at hudson.tasks.junit.TestResult.freeze(TestResult.java:657) at hudson.tasks.junit.TestResultAction.load(TestResultAction.java:211) at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:136) at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:62) at hudson.tasks.test.AbstractTestResultAction.findCorrespondingResult(AbstractTestResultAction.java:248) [end of repetition] Caused by: java.lang.OutOfMemoryError: GC overhead limit exceeded We're currently up to build #742 and the error occurred when attempting to load #358. I'm quite certain that I didn't attempt to view the report for this build so I'm not sure why it was loaded in the first place. The junitResult.xml file in question has roughly 4300 tests and is about 5 MB big. The Jenkins instance has a 5 GB heap and it doesn't do anything but display test results and manage test excution. The actual execution is done on a separate machine. I've taken a heap dump and viewed it in the Eclipse Memory Analyzer. The heap dump is from Jenkin's attempt to record test results for #741. From looking at the data, it seems that many instances of hudson.tasks.junit.TestResult are kept in memory at once. Those instances transitively retain hudson.tasks.junit.CaseResult. That might be a problem in our case because those contain standard output and error. That seems to add up. I've attached an edited version of the thread stack from the heap dump in case it's useful. Add Comment   This message was sent by Atlassian JIRA (v7.1.7#71011-sha1:2526d7c) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.