In our Netty layer we have had to take extra precautions against Netty
catching throwables which prevents them from reaching the uncaught
exception handler. This code has taken on additional uses in NIO layer
and now in the scheduler engine because there are other components in
stack traces that could catch throwables and suppress them from reaching
the uncaught exception handler. This commit is a simple cleanup of the
iterative evolution of this code to refactor all uses into a single
method in ExceptionsHelper.
In #29623 we added `Request` object flavored requests to the low level
REST client and in #30315 we deprecated the the old requests. This
changes many calls in the `qa` projects to use the new version.
I did a little digging. It looks like IOException is thrown when the other
side closes its connection while we're waiting on our buffer to fill up. We
totally expect that in this test. It feels to me like we should throw a
`ConnectionClosedException` but upstream does not agree:
https://issues.apache.org/jira/browse/HTTPASYNC-134
While we *could* catch the exception and transform it ourselves that
seems like a bigger change than is merited at this point.
Closes#29136
I have long wanted an actual test that dying with dignity works. It is
tricky because if dying with dignity works, it means the test JVM dies
which is usually an abnormal condition. And anyway, how does one force a
fatal error to be thrown. I was motivated to investigate this again by
the fact that I missed a backport to one branch leading to an issue
where Elasticsearch would not successfully die with dignity. And now we
have a solution: we install a plugin that throws an out of memory error
when it receives a request. We hack the standalone test infrastructure
to prevent this from failing the test. To do this, we bypass the
security manager and remove the PID file for the node; this tricks the
test infrastructure into thinking that it does not need to stop the
node. We also bypass seccomp so that we can fork jps to make sure that
Elasticsearch really died. And to be extra paranoid, we parse the logs
of the dead Elasticsearch process to make sure it died with
dignity. Never forget.
Alpar Torok
Jason Tedor
Tanguy Leroux
Nik Everett