Affects Version/s: 3.5.2
Fix Version/s: 3.5.3
Maven 3.5.2 multithreaded builds experience a deadlock not seen with Maven 3.5.0.
To reproduce the issue, clone GeoServer:
Build GeoServer community modules with:
Builds that normally take 2-4 minutes instead experience long hangs. jstack output (attached) suggests a deadlock (two different hangs attached). Some of the locks are in TIME_WAIT and eventually the build completes after 30-45 minutes, but this is enough to cause builds on Travis to be killed for their failure to output for ten minutes. (Travis upgraded to Maven 3.5.2 a week ago.)
I have only seen the failures with -U. The hang does not occur in single-threaded builds. There are no "*.lock" files in the local repository during the hang so the deadlocks are not mediated by the filesystem. CPU utilisation is zero suggesting a deadlock not a livelock.
See also discussion on the geoserver-devel mailing list: http://osgeo-org.1560.x6.nabble.com/Travis-failures-started-with-new-trusty-images-td5346836.html