Hi, I am seeing too many TCP sockets open by tomcat on Oracle Linux 8: java 51798 root 6601u sock 0,9 0t0 3959342 protocol: TCPv6
I was running the same application on Linux 7.6 with the same apache-tomcat version without seeing this issue. I saw that RedHat has remove apache-tomcat fom their Linux 8 distribution. Please help with throubleshooting and indicating if there is any changes in Linux 8 that can explain this Configuration: apache-tomcat-8.5.59 OEL Linux 8 kernel 4.18.0-193.28.1.el8_2.x86_64 Web-based application using Postgres and elastic search databases # ps -ef | grep tomcat root 51798 1 1 11:16 ? 00:06:01 /usr/local/jre/bin/java -Djava.util.logging.config.file=/usr/local/apache-tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -d64 -server -Xms1800m -Xmx8192m -XX:MaxMetaspaceSize=1800m -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /usr/local/apache-tomcat/bin/bootstrap.jar:/usr/local/apache-tomcat/bin/tomcat-juli.jar -Dcatalina.base=/usr/local/apache-tomcat -Dcatalina.home=/usr/local/apache-tomcat -Djava.io.tmpdir=/usr/local/apache-tomcat/temp org.apache.catalina.startup.Bootstrap start root 54122 54037 0 19:43 pts/1 00:00:00 grep --color=auto tomcat # cat /proc/51798/limits Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size unlimited unlimited bytes Max resident set unlimited unlimited bytes Max processes 256518 256518 processes Max open files 262144 262144 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 256518 256518 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us Too may open files: # lsof -p 51798 | wc -l 6679 Most of open files are TCP sockets: java 51798 root 6601u sock 0,9 0t0 3959342 protocol: TCPv6 # lsof -p 51798 | grep "protocol: TCPv6" | wc -l 6413 Thanks
