> The bug is due to the debug agent still having a reference to one of the > classes when the full GC is issued by the debuggee, thus keeping the classes > loaded. The debug agent it about to free the reference, but doesn't do it > quite soon enough, and then it is blocked from freeing it by the full GC. It > does free it after the full GC, but by then it is too late, and the full GC > has already failed to unload all the classes. > > The debug agent class reference is coming from the ClassPrepareEvent that is > sent for the last class loaded. The event has been sent to the debugger and > the debug agent is about to free the reference, but the debuggee main thread > has already resumed and gets to the full GC first. Adding a short delay in > the debuggee main thread allows the debug agent to finish freeing the > reference before the full GC is done.
Chris Plummer has updated the pull request incrementally with one additional commit since the last revision: fix comment typo ------------- Changes: - all: https://git.openjdk.org/jdk/pull/10519/files - new: https://git.openjdk.org/jdk/pull/10519/files/299cd75f..9c4f9905 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=10519&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10519&range=00-01 Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/10519.diff Fetch: git fetch https://git.openjdk.org/jdk pull/10519/head:pull/10519 PR: https://git.openjdk.org/jdk/pull/10519
