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Environment
Atlassian Confluence 6.12.0
mysql Ver 15.1 Distrib 5.5.60-MariaDB
openjdk version "1.8.0_181"
Parameter
/data/atlassian/confluence/jre//bin/java -Djava.util.logging.config.file=/data/atlassian/confluence/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -XX:ReservedCodeCacheSize=256m -XX:+UseCodeCacheFlushing -Dconfluence.context.path=/confluence -Datlassian.plugins.startup.options= -Dorg.apache.tomcat.websocket.DEFAULT_BUFFER_SIZE=32768 -Dsynchrony.enable.xhr.fallback=true -Xms1024m -Xmx1024m -XX:+UseG1GC -Datlassian.plugins.enable.wait=300 -Djava.awt.headless=true -XX:G1ReservePercent=20 -Xloggc:/data/atlassian/confluence/logs/gc-2020-07-10_08-40-18.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=2M -XX:-PrintGCDetails -XX:+PrintGCDateStamps -XX:-PrintTenuringDistribution -Dignore.endorsed.dirs= -classpath /data/atlassian/confluence/bin/bootstrap.jar:/data/atlassian/confluence/bin/tomcat-juli.jar -Dcatalina.base=/data/atlassian/confluence -Dcatalina.home=/data/atlassian/confluence -Djava.io.tmpdir=/data/atlassian/confluence/temp org.apache.catalina.startup.Bootstrap start
Result after 7 hours
catalina.2020-07-01.log:01-Jul-2020 02:27:15.823 SEVERE [http-nio-8090-exec-1] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcher] in context with path [/synchrony-proxy] threw exception [Handler processing failed; nested exception is java.lang.OutOfMemoryError: Java heap space] with root cause
java.lang.OutOfMemoryError: Java heap space
at java.util.LinkedHashMap.newNode(LinkedHashMap.java:256)
at java.util.HashMap.putVal(HashMap.java:631)
at java.util.HashMap.put(HashMap.java:612)
If you are seeing some performance issues or slowness. The first thing I would do is check the current maximum heap allocation on your instance lets say its 1GB, it is possible that you are simply running out of memory to perform the tasks that need to be performed on it. If you think that this is the case, a possible resolution step would be to increase the heap allocation on the JVM, so increase the -XX:MaxPermSize parameter in 256mb increments until the error stops occurring.
Here are some helpful Resources:
Server Hardware Requirements Guide
Memory Usage and Requirements
Managing Application Server Memory Settings
How to analyze thread dumps
Will try tonight (/data/atlassian/confluence/bin/setenv.sh):
old: CATALINA_OPTS="-Xms1024m -Xmx1024m -XX:+UseG1GC ${CATALINA_OPTS}"
new: CATALINA_OPTS="-Xms1024m -Xmx1280m -XX:+UseG1GC ${CATALINA_OPTS}"
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