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The following commit(s) were added to refs/heads/master by this push:
new c78f7a729 IMPALA-14392: Fix a crash in AdmissionD in GetQueryStatus
PrintId()
c78f7a729 is described below
commit c78f7a72902c7e96ed86d3344186ba8bdeb03520
Author: Yida Wu <[email protected]>
AuthorDate: Wed Sep 3 17:17:48 2025 -0700
IMPALA-14392: Fix a crash in AdmissionD in GetQueryStatus PrintId()
The GetQueryStatus RPC could crash due to a use-after-free error
when accessing the reqest. When a query was rejected, the
function would call RespondAndReleaseRpc(), which can free the "req"
object, and then attempt to access req->query_id() for logging and
to delete the entry from the admission_state_map_.
This commit fixes the crash by moving the call to
RespondAndReleaseRpc() to the end of the function. This change
aligns this function with others like
AdmissionControlService::ReleaseQuery(), which also deletes from
admission_state_map_ before RespondAndReleaseRpc(), it ensures
that all logic is completed before the RPC resources are released.
Tests:
Reproduced the issue by running 100 times
TestAdmissionControllerStressWithACService::test_mem_limit, and
after the change, it can successfully run 100 times.
Passed exhaustive tests.
Change-Id: I688954c5c671671cc2dc669ecfdf2405476302d7
Reviewed-on: http://gerrit.cloudera.org:8080/23379
Reviewed-by: Michael Smith <[email protected]>
Tested-by: Michael Smith <[email protected]>
---
be/src/scheduling/admission-control-service.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/be/src/scheduling/admission-control-service.cc
b/be/src/scheduling/admission-control-service.cc
index be6c33bd0..f39a3c6b9 100644
--- a/be/src/scheduling/admission-control-service.cc
+++ b/be/src/scheduling/admission-control-service.cc
@@ -211,7 +211,6 @@ void AdmissionControlService::GetQueryStatus(const
GetQueryStatusRequestPB* req,
}
}
- RespondAndReleaseRpc(status, resp, rpc_context);
if (admission_state->admission_done && !admission_state->admit_status.ok()) {
LOG(INFO) << "Query " << req->query_id()
<< " was rejected. Removing admission state to free resources.";
@@ -222,6 +221,7 @@ void AdmissionControlService::GetQueryStatus(const
GetQueryStatusRequestPB* req,
discard_result(admission_state_map_.Delete(req->query_id()));
VLOG(3) << "Current admission state map size: " <<
admission_state_map_.Count();
}
+ RespondAndReleaseRpc(status, resp, rpc_context);
}
void AdmissionControlService::ReleaseQuery(const ReleaseQueryRequestPB* req,
