void sendFailure(UserRpcException e) {
sendOnce();
UserException uex = UserException.systemError(e).addIdentity(e.getEndpoint()).build(logger);
logger.error("Unexpected Error while handling request message", e);
OutboundRpcMessage outMessage =
new OutboundRpcMessage(
RpcMode.RESPONSE_FAILURE, 0, coordinationId, uex.getOrCreatePBError(false));
if (RpcConstants.EXTRA_DEBUGGING) {
logger.debug("Adding message to outbound buffer. {}", outMessage);
}
connection.getChannel().writeAndFlush(outMessage);
}
@Override
public void close() {
Preconditions.checkState(!isClosed);
Preconditions.checkState(resultState != null);
logger.info("foreman cleaning up.");
injector.injectPause(queryContext.getExecutionControls(), "foreman-cleanup", logger);
// remove the channel disconnected listener (doesn't throw)
closeFuture.removeListener(closeListener);
// log the query summary
logQuerySummary();
// These are straight forward removals from maps, so they won't throw.
drillbitContext.getWorkBus().removeFragmentStatusListener(queryId);
drillbitContext
.getClusterCoordinator()
.removeDrillbitStatusListener(queryManager.getDrillbitStatusListener());
suppressingClose(queryContext);
/*
* We do our best to write the latest state, but even that could fail. If it does, we can't write
* the (possibly newly failing) state, so we continue on anyway.
*
* We only need to do this if the resultState differs from the last recorded state
*/
if (resultState != state) {
suppressingClose(
new AutoCloseable() {
@Override
public void close() throws Exception {
recordNewState(resultState);
}
});
}
/*
* Construct the response based on the latest resultState. The builder shouldn't fail.
*/
final QueryResult.Builder resultBuilder =
QueryResult.newBuilder().setQueryId(queryId).setQueryState(resultState);
final UserException uex;
if (resultException != null) {
final boolean verbose =
queryContext.getOptions().getOption(ExecConstants.ENABLE_VERBOSE_ERRORS_KEY).bool_val;
uex =
UserException.systemError(resultException)
.addIdentity(queryContext.getCurrentEndpoint())
.build(logger);
resultBuilder.addError(uex.getOrCreatePBError(verbose));
} else {
uex = null;
}
// we store the final result here so we can capture any error/errorId in the profile for later
// debugging.
queryManager.writeFinalProfile(uex);
/*
* If sending the result fails, we don't really have any way to modify the result we tried to send;
* it is possible it got sent but the result came from a later part of the code path. It is also
* possible the connection has gone away, so this is irrelevant because there's nowhere to
* send anything to.
*/
try {
// send whatever result we ended up with
initiatingClient.sendResult(responseListener, resultBuilder.build(), true);
} catch (final Exception e) {
addException(e);
logger.warn("Exception sending result to client", resultException);
}
// Remove the Foreman from the running query list.
bee.retireForeman(Foreman.this);
try {
releaseLease();
} finally {
isClosed = true;
}
}
private static void throwAsUnsupportedException(UserException ex) throws Exception {
SqlUnsupportedException.errorClassNameToException(
ex.getOrCreatePBError(false).getException().getExceptionClass());
throw ex;
}