> Hi, please find here a patch that solves a rare intermittent test failure > observed in the test `java/net/httpclient/ExecutorShutdown.java` > > A race condition coupled with some too eager synchronization was causing a > deadlock between an Http2Connection close, a thread trying to shutdown the > HttpClient due to a RejectedTaskException, and the SelectorManager thread > trying to exit. > > The fix comprises several cleanup - in particular: > > - `Http2Connection`: no need to try to send a `GOAWAY` frame if the > underlying TCP connection is already closed > - `SSLFlowDelegate`/`SubscriberWrapper`: no need to trigger code that will > request more data from upstream if the sequential scheduler that is supposed > to handle that data once it arrives is already closed > - `Http1Exchange`/`Http1Request`: proper cancellation of subscription if an > exception is raised before `onSubscribe()` has been called > - `HttpClientImpl`: avoid calling callbacks from within synchronized blocks > when not necessary > - `ReferenceTracker`: better thread dumps in case where the selector is still > alive at the end of the test (remove the limit that limited the stack traces > to 8 element max by no longer relying on `ThreadInfo::toString`)
Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision: Added a comment to ReferenceTracker.java as suggested in the review ------------- Changes: - all: https://git.openjdk.java.net/jdk/pull/8562/files - new: https://git.openjdk.java.net/jdk/pull/8562/files/0a674cef..ce8ad93d Webrevs: - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8562&range=01 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8562&range=00-01 Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/8562.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/8562/head:pull/8562 PR: https://git.openjdk.java.net/jdk/pull/8562
