* Hi, Igniters.
We’ve found that enabled by default socket linger causes unexpected delay in detection of node failure.
Moreover, long closing of socket works as Thread.sleep() within algorithms of failure detection and connection recovery in TCP discovery. These time gaps lead to hardly predictable behavior of the discovery. When the socket linger is enabled, it’s hard or even impossible to figure out what time is taken to detect node failure and restore connections with the provided settings.
Socket linger was enabled only as a workaround for SSL bugs (i.e. [2], [3]). It was enabled without including in failure processing routines in TCP discovery SPI as described above. SSL bugs, mentioned above, were fixed and backported to various JDK, supporting TLS 1.3 ([4] and [5]).
I’d suggest to disable socket linger by default, because enabled socket linger prolongs detection of node failure. The ticket is [1]. In case of SSL issues the linger could be enabled. Or one may just update JDK. We'll provide the documentation.
WDYT? [1] https://issues.apache.org/jira/browse/IGNITE-13643 [2] https://bugs.openjdk.java.net/browse/JDK-8219658 [3]https://issues.apache.org/jira/browse/IGNITE-12818 [4]https://bugs.openjdk.java.net/browse/JDK-8245468 [5] https://www.oracle.com/java/technologies/javase/8u261-relnotes.html *
