> On Jul 10, 2024, at 15:19, Jalaj Asher > <jalaj.as...@eclinicalworks.com.INVALID> wrote: > > We are using tomcat version 9.0.80. > > We are seeing intermittent CPU spikes with the requests having the following > stack and it is also causing disk spikes on our end because of this call > stack . > > at java.util.zip.ZipFile.getEntry(Native Method) > at java.util.zip.ZipFile.getEntry(ZipFile.java:328) > - locked <0x00000000bb4fbf08> (a java.util.jar.JarFile) > at java.util.jar.JarFile.getEntry(JarFile.java:253) > at java.util.jar.JarFile.getJarEntry(JarFile.java:236) > at > org.apache.catalina.webresources.AbstractSingleArchiveResourceSet.getArchiveEntry(AbstractSingleArchiveResourceSet.java:97) > at > org.apache.catalina.webresources.AbstractArchiveResourceSet.getResource(AbstractArchiveResourceSet.java:249) > at > org.apache.catalina.webresources.StandardRoot.getResourcesInternal(StandardRoot.java:316) > at > org.apache.catalina.webresources.StandardRoot.getResources(StandardRoot.java:307) > at > org.apache.catalina.webresources.StandardRoot.getClassLoaderResources(StandardRoot.java:226) > at > org.apache.catalina.loader.WebappClassLoaderBase.findResources(WebappClassLoaderBase.java:1009) > at > org.apache.catalina.loader.WebappClassLoaderBase.getResources(WebappClassLoaderBase.java:1110) > at java.util.ServiceLoader$LazyIterator.hasNextService(ServiceLoader.java:348) > at java.util.ServiceLoader$LazyIterator.hasNext(ServiceLoader.java:393) > at java.util.ServiceLoader$1.hasNext(ServiceLoader.java:474) > at javax.xml.parsers.FactoryFinder$1.run(FactoryFinder.java:293) > at java.security.AccessController.doPrivileged(Native Method) > > these are the runnable threads. > > Wanted to get some understanding to see when does tomcat access the > archiveresourceset and why is it calling getjarentry and zip file entry and > any suggestions to address this issue ?
Is unpackWARs set to false in the <Host> element, or is unpackWAR false in the <Context> element for the webapp(s)? Have you disabled resource caching for the webapp(s)? Look at any <Resources> element inside a <Context> for the cachingAllowed and related attributes. There’s a somewhat long discussion on this topic starting here: https://marc.info/?l=tomcat-user&m=169909563517770&w=2 - Chuck
