} else {
Throwable t = (Throwable) response;
Throwable unwrap = ExceptionsHelper.unwrapCause(t);
if (unwrap instanceof SearchPhaseExecutionException) {
SearchPhaseExecutionException e = (SearchPhaseExecutionException) unwrap;
for (ShardSearchFailure failure : e.shardFailures()) {
assertTrue("got unexpected reason..." + failure.reason(), failure.reason().toLowerCase(Locale.ENGLISH).contains("rejected"));
}
} else if ((unwrap instanceof EsRejectedExecutionException) == false) {
throw new AssertionError("unexpected failure", (Throwable) response);
}