вт, 27 окт. 2020 г. в 00:07, Eric Robinson <eric.robin...@psmnv.com>: > > > On 26/10/2020 10:26, Mark Thomas wrote: > > > On 24/10/2020 01:32, Eric Robinson wrote: > > > > > > At this point I'd echo Konstantin's recommendation to add the > > > following system property: > > > org.apache.catalina.connector.RECYCLE_FACADES=true > > > > > > You'd normally do this in $CATALINA_HOME/bin/setenv.sh (creating that > > > file if necessary) with a line like: > > > > > > CATALINA_OPTS="$CATALINA_OPTS > > > -Dorg.apache.catalina.connector.RECYCLE_FACADES=true" > > > > > > You can confirm that the setting has been applied by looking in the > > > log for the start-up. You should see something like: > > > > > > Oct 26, 2020 10:18:45 AM > > > org.apache.catalina.startup.VersionLoggerListener log > > > INFO: Command line argument: > > > -Dorg.apache.catalina.connector.RECYCLE_FACADES=true > > > > > > > > > That option reduces the re-use of request, response and related > > > objects between requests and, if an application is retaining > > > references it shouldn't, you usually see a bunch of > > > NullPointerExceptions in the logs when the application tries to re-use > > > those > > objects. > > > > > > Meanwhile, I'm going to work on a custom patch for 7.0.72 to add some > > > additional logging around the network writes. > > > > Patch files and instructions for use: > > > > http://home.apache.org/~markt/dev/v7.0.72-custom-patch-v1/ > > > > Mark > > Hi Mark, > > A couple of questions. > > 1. Now that you have provided this patch, should I still enable > RECYCLE_FACADES=true?
Regarding the patch, there is no source code for it, but I think that it adds debug logging, nothing more. RECYCLE_FACADES makes your configuration more safe, protecting Tomcat from misbehaving web applications. I have that property set on all Tomcat installations that I care about. Thus I think that you should set it anyway. I usually add that property into the conf/catalina.property file. See the wiki for a more detailed answer. https://cwiki.apache.org/confluence/display/TOMCAT/Troubleshooting+and+Diagnostics#TroubleshootingandDiagnostics-TroubleshootingunexpectedResponsestateproblems My thought that you case could be caused by something like the "Java ImageIO" issue mentioned there. If something in the web application produces dangling references to java.io.OutputStream and they are closed during garbage collection, corrupting Tomcat internals. > 2. [...] Can you think of any potential issues where making this change for > one instance could have a negative effect on any of the other instances? > Probably not, but just being careful. I hope that you can cope with the amount of logging that this generates. Best regards, Konstantin Kolinko --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
