Thank you Christoper for the insight. Yeah I was wondering the same as this has been in place since a few years now atleast 4 years since cachingAllowed had some changes in tomcat 8 which was resulting in it caching all static content as well as jsps and jars and our though process was if we have static content being cached on the client end and jsps in the work folder each time on access we don’t need the cache.
Is there a way to cache just the jars and not every thing else in memory ? Regards Jalaj P Asher -----Original Message----- From: Christopher Schultz <ch...@christopherschultz.net> Sent: Friday, July 12, 2024 4:02 PM To: users@tomcat.apache.org Subject: Re: Reg: tomcat CPU spikes Attention! - This email has originated from an External Source outside of eClinicalWorks. Always use caution when opening attachments, clicking links, or when responding to this email. If you feel this is a phishing scam, please use the Phish Alert Report button in Outlook. Jalaj, On 7/12/24 10:19, Jalaj Asher wrote: > Thank you Chuck and John for the responses. > > Just a few points from the things you highlighted and wanted me to > check 1. unpackwar is set to true. I checked and was informed that we need > that to be true for a specific war file. > 2. cachingAllowed=false. We keep it as false across the board. Well... that'll do it. In order to locate resources, Tomcat needs to sift through all of those JAR files every time. Scanning ZIP files is expensive. You might want to reconsider this particular setting in your environment. > Also the reason I shared 2 different stacks is to highlight that the > problem does not occur post restart or with any specific part of the > application like the parser going in a loop but it kicks of at random > times impacting multiple tomcats. But all having the same stack > waiting on archiveresourceset and java.util.zip. My only question would be "why is this only now coming to your attention? Things should have been behaving this way .. for a long time. > I am working on getting both types of stacks to share here as well. > > Had a question we just have one war file if unpack war is triggered > why should it impact loading jars from the entire webapp lib ? Because WEB-INF/lib is full of JAR files that need to be scanned every tie you try to load ... anything. Since you have disabled caching, it has to re-check every file for every resource-load request. -chris > -----Original Message----- > From: Chuck Caldarale <n82...@gmail.com> > Sent: Wednesday, July 10, 2024 6:19 PM > To: Tomcat Users List <users@tomcat.apache.org> > Subject: Re: Reg: tomcat CPU spikes > > Attention! - This email has originated from an External Source outside of > eClinicalWorks. Always use caution when opening attachments, clicking links, > or when responding to this email. If you feel this is a phishing scam, please > use the Phish Alert Report button in Outlook. > > >> On Jul 10, 2024, at 17:02, Jalaj Asher >> <jalaj.as...@eclinicalworks.com.INVALID> wrote: >> >> Sharing another stack to see if this can give any more insights.this thread >> is the tomcat main thread was loading about 65MB of data. >> >> "main" #1 prio=5 os_prio=0 >> java.lang.Thread.State: RUNNABLE >> at java.util.zip.ZipFile.getEntry(Native Method) >> at java.util.zip.ZipFile.getEntry(ZipFile.java:328) >> - locked <0x00000000a1b04418> (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.getResourceInternal(StandardRoot.java:272) >> at >> org.apache.catalina.webresources.StandardRoot.getResource(StandardRoot.java:213) >> at >> org.apache.catalina.webresources.StandardRoot.getClassLoaderResource(StandardRoot.java:220) >> at >> org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2348) >> at >> org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:875) >> at >> org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1376) >> - locked <0x00000000f24fc728> (a java.lang.Object) >> at >> org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1220) >> at java.lang.Class.forName0(Native Method) >> at java.lang.Class.forName(Class.java:348) >> at >> com.sun.beans.finder.ClassFinder.findClass(ClassFinder.java:67) >> at >> com.sun.beans.finder.ClassFinder.findClass(ClassFinder.java:110) >> at >> com.sun.beans.finder.InstanceFinder.instantiate(InstanceFinder.java:93) >> at >> com.sun.beans.finder.InstanceFinder.find(InstanceFinder.java:66) >> at >> java.beans.Introspector.findExplicitBeanInfo(Introspector.java:448) >> at java.beans.Introspector.<init>(Introspector.java:398) >> at java.beans.Introspector.getBeanInfo(Introspector.java:173) >> at >> org.springframework.beans.CachedIntrospectionResults.getBeanInfo(Cach >> edIntrospectionResults.java:255) > > > Is there some configuration setting in Spring that would disable > caching? (I’m not really knowledgeable about Spring.) > > There should be more in the stack trace that would show what’s triggering the > getBeanInfo() calls. Tomcat won’t be doing the lookup unless something asks > for it. > > - Chuck > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > CONFIDENTIALITY NOTICE TO RECIPIENT: This transmission contains confidential > information belonging to the sender that is legally privileged and > proprietary and may be subject to protection under the law, including the > Health Insurance Portability and Accountability Act (HIPAA). If you are not > the intended recipient of this e-mail, you are prohibited from sharing, > copying, or otherwise using or disclosing its contents. If you have received > this e-mail in error, please notify the sender immediately by reply e-mail > and permanently delete this e-mail and any attachments without reading, > forwarding or saving them. Thank you. > > CONFIDENTIALITY NOTICE TO RECIPIENT: This transmission contains confidential > information belonging to the sender that is legally privileged and > proprietary and may be subject to protection under the law, including the > Health Insurance Portability and Accountability Act (HIPAA). If you are not > the intended recipient of this e-mail, you are prohibited from sharing, > copying, or otherwise using or disclosing its contents. If you have received > this e-mail in error, please notify the sender immediately by reply e-mail > and permanently delete this e-mail and any attachments without reading, > forwarding or saving them. Thank you. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org CONFIDENTIALITY NOTICE TO RECIPIENT: This transmission contains confidential information belonging to the sender that is legally privileged and proprietary and may be subject to protection under the law, including the Health Insurance Portability and Accountability Act (HIPAA). If you are not the intended recipient of this e-mail, you are prohibited from sharing, copying, or otherwise using or disclosing its contents. If you have received this e-mail in error, please notify the sender immediately by reply e-mail and permanently delete this e-mail and any attachments without reading, forwarding or saving them. Thank you. CONFIDENTIALITY NOTICE TO RECIPIENT: This transmission contains confidential information belonging to the sender that is legally privileged and proprietary and may be subject to protection under the law, including the Health Insurance Portability and Accountability Act (HIPAA). If you are not the intended recipient of this e-mail, you are prohibited from sharing, copying, or otherwise using or disclosing its contents. If you have received this e-mail in error, please notify the sender immediately by reply e-mail and permanently delete this e-mail and any attachments without reading, forwarding or saving them. Thank you.
