Details
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Bug
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Resolution: Fixed
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Medium
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6.4.13
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6.04
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7
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Severity 2 - Major
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11
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Description
Problem Definition
The number of nodes plays a role on the total time taken to complete a Project Import in JIRA Data Center (JDC). This is due the additional actions it need to perform in the background by communicating with all the available nodes and replicating those information across them.
This result project import to take a longer time when the same set of data is used:
- 12 nodes took ~9 hours in total
- 1 node took ~30 minutes in total
Additional data
The Project import process has 3 stages and not until the last stage where it will make changes to the database. The first 2 stages are processing the XML and mapping the field values, where in comparison took the most time and has the biggest differences. As an example:
| 6 nodes | 2 nodes | |
|---|---|---|
| Processing XML | 55 minutes | 5 minutes |
| Mapping field values | 55 minutes | 5 minutes |
In the background, the process parses XML backup <- caches the progress <- replicates the progress via copy across the cluster <- lists nodes to notify.
The following thread can be seen long running taken during parsing the XML
"JiraTaskExectionThread-1" #1141 daemon prio=5 tid=0x00007f9bd9500800 nid=0x6a0f runnable [0x00007f9a72664000] java.lang.Thread.State: RUNNABLE at java.net.SocketInputStream.socketRead0(Native Method) (...) at com.atlassian.jira.cluster.distribution.JiraCacheManagerPeerProvider.listRemoteCachePeers(JiraCacheManagerPeerProvider.java:93) at net.sf.ehcache.distribution.RMISynchronousCacheReplicator.listRemoteCachePeers(RMISynchronousCacheReplicator.java:335) at net.sf.ehcache.distribution.RMISynchronousCacheReplicator.replicatePutNotification(RMISynchronousCacheReplicator.java:145) (...) at com.atlassian.jira.imports.project.handler.ChainedSaxHandler.endElement(ChainedSaxHandler.java:151) at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source) at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at com.atlassian.security.xml.RestrictedXMLReader.parse(RestrictedXMLReader.java:103) at com.atlassian.jira.imports.xml.DefaultBackupXmlParser.parseBackupXml(DefaultBackupXmlParser.java:54) at com.atlassian.jira.imports.project.DefaultProjectImportManager.getBackupOverview(DefaultProjectImportManager.java:202) at com.atlassian.jira.bc.imports.project.DefaultProjectImportService.getBackupOverview(DefaultProjectImportService.java:186) at com.atlassian.jira.web.action.admin.importer.project.ProjectImportSelectBackup$BackupOverviewCallable.call(ProjectImportSelectBackup.java:245) at com.atlassian.jira.web.action.admin.importer.project.ProjectImportSelectBackup$BackupOverviewCallable.call(ProjectImportSelectBackup.java:233) at com.atlassian.jira.task.TaskManagerImpl$TaskCallableDecorator.call(TaskManagerImpl.java:528) at com.atlassian.jira.task.TaskManagerImpl$TaskCallableDecorator.call(TaskManagerImpl.java:491) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at com.atlassian.jira.task.ForkedThreadExecutor$ForkedRunnableDecorator.run(ForkedThreadExecutor.java:254) at java.lang.Thread.run(Thread.java:745)
Notes:
Most probably related to bug: https://jira.terracotta.org/jira/browse/EHC-640
Workaround
Have a single node available with others shutdown during offpeak hours to run the Project Import.
Attachments
Issue Links
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- Closed
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