I'd expect a lot more than that, and something mentioning licencing.
However that error is a "Garbage Collection" error, and that could well be the system failing at the wrong time, or triggered by memory changes as you try to apply the licence.
I'd want to fix that in any case. What are the memory settings for the service? (ps -ef | grep -i jira would expose them all on a command line)
catalina.out log: https://yadi.sk/d/gTEUj6He3Lb8va
[root@host7 logs]# ps -ef | grep -i jira
jira 16280 1 3 19:58 ? 00:02:53 /opt/atlassian/jira/jre//bin/java -Djava.util.logging.config.file=/opt/atlassian/jira/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms384m -Xmx768m -Djava.awt.headless=true -Datlassian.standalone=JIRA -Dorg.apache.jasper.runtime.BodyContentImpl.LIMIT_BUFFER=true -Dmail.mime.decodeparameters=true -Dorg.dom4j.factory=com.atlassian.core.xml.InterningDocumentFactory -XX:-OmitStackTraceInFastThrow -Datlassian.plugins.startup.options= -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Xloggc:/opt/atlassian/jira/logs/atlassian-jira-gc-%t.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=20M -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+PrintGCCause -classpath /opt/atlassian/jira/bin/bootstrap.jar:/opt/atlassian/jira/bin/tomcat-juli.jar -Dcatalina.base=/opt/atlassian/jira -Dcatalina.home=/opt/atlassian/jira -Djava.io.tmpdir=/opt/atlassian/jira/temp org.apache.catalina.startup.Bootstrap start
root 17093 617 0 21:13 pts/0 00:00:00 grep --color=auto -i jira
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