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It is possible to have UpdateFilterFromRemote RPC arrive to an impalad executor before QueryState of the destination query is created or complete initialization. This patch add wait mechanism in UpdateFilterFromRemote RPC endpoint to wait for few miliseconds until QueryState exist and complete initialization. The wait time is fixed at 500ms, with exponential sleep period in between. If wait time passed and QueryState still not found or initialized, UpdateFilterFromRemote RPC is deemed fail and query execution move on without complete filter. Testing: - Add BE tests in network-util-test.cc - Add test_runtime_filter_aggregation.py::TestLateQueryStateInit - Pass exhastive runs of test_runtime_filter_aggregation.py, test_query_live.py, and test_query_log.py Change-Id: I156d1f0c694b91ba34be70bc53ae9bacf924b3b9 Reviewed-on: http://gerrit.cloudera.org:8080/21383 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>