Hi, I'm a Java developer getting a crash and error message 'free(): corrupted unsorted chunks' in the log. this sounds like it could be a low level issue in the core Java libraries so I'm posting here, but if it would be better in another list (or even a different community) please let me know.
So I'm requesting help because I don't know how to debug this further. In summary, the issue is We're getting a crash nearly once a day on our production system, at a time of day when it's most busy (mid morning). This crash hasn't been seen on our development environment, which is the same apart from the server has less memory and CPU resources. The environment is: * A VPS host * Ubuntu LTS 18 (Bionic) * The default Java 10 packaged as 11 I believe ( https://askubuntu.com/questions/1037646/why-is-openjdk-10-packaged-as-openjdk-11 ) * However, javac seems to be from JDK8: root@server:~# file /etc/alternatives/java /etc/alternatives/javac /etc/alternatives/java: symbolic link to /usr/lib/jvm/java-11-openjdk-amd64/bin/java /etc/alternatives/javac: symbolic link to /usr/lib/jvm/java-8-openjdk-amd64/bin/javac We're running our webapp on Tomcat 8 (also the Ubuntu default). When this happens, the server stops responding to HTTP requests (in fact the java process has quit) and needs to be restarted. The crash doesn't seem to correspond to a particular activity on the server as far as I can see, though it's hard to tell as many people are logged in at the same time. Does anyone have any pointers of a) how to track the bug further so I can report it, ideally without a big impact on our live server b) more immediately, any workarounds to try In the meantime I will see if I can downgrade to JDK8 on the test server, but I'm not sure if that's possible or whether it would make a difference. Regards Oliver
