You are indeed correct, the culprit is a `%` in the java options of our
affected servers, one example being:
JAVA_OPTS="-Djava.awt.headless=true
-XX:ErrorFile=/var/log/tomcat7/java_error%p.log -Xms15025m -Xmx15025m
-XX:+DisableExplicitGC -XX:+UseG1GC -XX:+UseStringDeduplication"
And for completeness:
$ debconf-show tomcat7
tomcat7/groupname: tomcat7
tomcat7/javaopts: -Djava.awt.headless=true
-XX:ErrorFile=/var/log/tomcat7/java_error%p.log -Xms15025m -Xmx15025m
-XX:+DisableExplicitGC -XX:+UseG1GC -XX:+UseStringDeduplication
tomcat7/username: tomcat7
At first blush our solution worked, but this was a side affect of our
configuration management system rewriting the file and camouflaging the
fact that it isn't actually a solution at all!
Anyway, your explanation of what the regular expression is actually trying to
accomplish leads to what I believe is a relatively trivial use of parameter
expansion to escape the '%' in the JAVA_OPT environment variable:
| sed "s%^JAVA_OPTS=.*$%JAVA_OPTS=\"${JAVA_OPTS/\%/\\\%}\"%"
I was rather suspicious that this wasn't a known bug already, so I guess
I should have dug deeper originally.
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https://bugs.launchpad.net/bugs/1666570
Title:
Post install script has error in RegEx
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