Java 在 Ubuntu linux 上崩溃

Question

Suddenly from one day to the next, with no apparent software or configuration changes we are starting to get JVM crashes with the following in the syslog:

 *** Error in `java': double free or corruption (fasttop): 0x00007f70344753d0 ***
 ======= Backtrace: =========
 /lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7f7051ca17e5]
 /lib/x86_64-linux-gnu/libc.so.6(+0x8037a)[0x7f7051caa37a]
 /lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7f7051cae53c]
 /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/libfontmanager.so(Java_sun_font_FreetypeFontScaler_disposeNativeScaler+0x64)[0x7f7028cd6154]
 [0x7f7039017e07]

As far as I can gather from similar issues this is caused by an error in a native library - in this case probably libfontmanager.so.

How can this be diagnosed further? Can I get a java-stacktrace of the situation causing this problem? In case this is a concurrency issue, it could perhaps be fixed on the java-side of things.

Using OpenJDK 1.8.0_181 on Ubuntu 16.04.5. I am unable to find a newer java build in Ubuntu repositories - maybe I overlooked it?

This is a production environment, so upgrade of major java version etc. would not be easy.

Answer 1

Looks like this was possibly caused by pdfbox version 1.8 (or actually possibly more likely fontbox version 1.8). After upgrading both to version 2.0, the problem looks like it might have gone away.

However several things were tried in a frenzy, to try to get rid of this problem, so this is not known for certain. Also the issue was intermittent, and might possibly not have been solved, even though it looks like it until now.