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https://issues.apache.org/jira/browse/FELIX-5665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16137137#comment-16137137
]
AnilKumar Attuluri commented on FELIX-5665:
-------------------------------------------
[~karlpauls]
Here is the thread dump for the access:
{code:java}
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:1329)
at
org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1514)
at
org.apache.felix.framework.BundleWiringImpl.getResourceByDelegation(BundleWiringImpl.java:1458)
at
org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.getResource(BundleWiringImpl.java:2589)
at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1307)
at org.apache.xerces.parsers.SecuritySupport$6.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.xerces.parsers.SecuritySupport.getResourceAsStream(Unknown Source)
at
org.apache.xerces.parsers.ObjectFactory.findJarServiceProvider(Unknown Source)
at org.apache.xerces.parsers.ObjectFactory.createObject(Unknown Source)
at org.apache.xerces.parsers.ObjectFactory.createObject(Unknown Source)
at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)
at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Unknown Source)
at
org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown
Source)
at
org.apache.xalan.transformer.TransformerIdentityImpl.createResultContentHandler(TransformerIdentityImpl.java:228)
at
org.apache.xalan.transformer.TransformerIdentityImpl.setDocumentLocator(TransformerIdentityImpl.java:881)
at
com.sun.xml.bind.v2.runtime.unmarshaller.DomLoader$State.<init>(DomLoader.java:78)
at
com.sun.xml.bind.v2.runtime.unmarshaller.DomLoader.startElement(DomLoader.java:113)
at
com.sun.xml.bind.v2.runtime.unmarshaller.ProxyLoader.startElement(ProxyLoader.java:55)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:481)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:459)
at
com.sun.xml.bind.v2.runtime.unmarshaller.SAXConnector.startElement(SAXConnector.java:148)
at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown
Source)
at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.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.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:211)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:190)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:241)
at
com.intuit.platform.integration.oauth2.client.tokens.internal.cache.BearerTokenXmlConverter.unmarshall(BearerTokenXmlConverter.java:43)
{code}
> High CPU usage on sun.reflect.Generated* class loads by log4j
> --------------------------------------------------------------
>
> Key: FELIX-5665
> URL: https://issues.apache.org/jira/browse/FELIX-5665
> Project: Felix
> Issue Type: Improvement
> Components: Framework
> Affects Versions: framework-5.6.4
> Reporter: AnilKumar Attuluri
> Assignee: Karl Pauls
> Fix For: framework-5.6.8
>
> Attachments: FELIX-5665.patch, IMG_1.jpg, IMG_2.jpg
>
>
> We have been running some performance tests to prepare our OSGi bundle
> (*running in Apache Karaf*) for production.
> Just to give some background about our OSGi bundle, we converted an existing
> Spring application into an OSGi bundle with all the current dependencies
> packaged into the bundle as an uber artifact.
> When we run >= 500 TPS (each of these calls results in a http call made via a
> library) we run into this high CPU usage spikes reaching up to 100% CPU.
> Please see the image attached, the spikes in the image are 100% CPU usage
> while the average is about 40%. Also see the CPU sampler image which points
> to
> *org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation*
> Is there an existing bug/documentation that already captures this?
> We don't see this behavior when we run the same app in standalone JVM.
>
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