sockjs heartbeat failure logged at ERROR level [SPR-15307] #19871
when a sockjs heartbeat fails with a
however, looks like this exception is also thrown if a client just goes away, which does not qualify as an error condition but should rather be expected.
would be nice if this condition is just logged at
the reference url shows a corresponding stackoverflow question. that one is using the tomcat APR connector, it seems but we also get such error logs frequently with the tomcat NIO connector, then it looks like:
Affects: 4.2.6, 4.3.7