Hello Andrew Sherman, Riza Suminto, Jason Fehr, Impala Public Jenkins, I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/20762 to look at the new patch set (#47). Change subject: IMPALA-12540: Query Live Table ...................................................................... IMPALA-12540: Query Live Table Defines SystemTable which are in-memory tables that can provide access to Impala state. Adds the 'impala_query_live' to the database 'sys', which already exists for 'sys.impala_query_log'. Implements the 'impala_query_live' table to view active queries across all coordinators sharing the same statestore. SystemTables create new SystemTableScanNodes for their scan node implementation. When computing scan range locations, SystemTableScanNodes creates a scan range for each in the cluster (identified via ClusterMembershipMgr). This produces a plan that looks like: Query: explain select * from sys.impala_query_live +------------------------------------------------------------+ | Explain String | +------------------------------------------------------------+ | Max Per-Host Resource Reservation: Memory=4.00MB Threads=2 | | Per-Host Resource Estimates: Memory=11MB | | WARNING: The following tables are missing relevant table | | and/or column statistics. | | sys.impala_query_live | | | | PLAN-ROOT SINK | | | | | 01:EXCHANGE [UNPARTITIONED] | | | | | 00:SCAN SYSTEM_TABLE [sys.impala_query_live] | | row-size=72B cardinality=20 | +------------------------------------------------------------+ Impala's scheduler checks for whether the query contains fragments that can be scheduled on coordinators, and if present includes an ExecutorGroup containing all coordinators. These are used to schedule scan ranges that are flagged as 'use_coordinator', allowing SystemTableScanNodes to be scheduled on dedicated coordinators and outside the selected executor group. Execution will pull data from ImpalaServer on the backend via a SystemTableScanner implementation based on table name. In the query profile, SYSTEM_TABLE_SCAN_NODE includes ActiveQueryCollectionTime and PendingQueryCollectionTime to track time spent collecting QueryState from ImpalaServer. Grants QueryScanner private access to ImpalaServer, identical to how ImpalaHttpHandler access internal server state. Change-Id: Ie2f9a449f0e5502078931e7f1c5df6e0b762c743 --- M be/src/exec/CMakeLists.txt M be/src/exec/exec-node.cc M be/src/exec/scan-node.cc A be/src/exec/system-table-scan-node.cc A be/src/exec/system-table-scan-node.h A be/src/exec/system-table-scanner.cc A be/src/exec/system-table-scanner.h M be/src/runtime/descriptors.cc M be/src/runtime/descriptors.h M be/src/scheduling/admission-controller.cc M be/src/scheduling/cluster-membership-mgr-test.cc M be/src/scheduling/cluster-membership-mgr.cc M be/src/scheduling/cluster-membership-mgr.h M be/src/scheduling/scheduler-test-util.cc M be/src/scheduling/scheduler-test-util.h M be/src/scheduling/scheduler-test.cc M be/src/scheduling/scheduler.cc M be/src/scheduling/scheduler.h M be/src/service/fe-support.cc M be/src/service/frontend.h M be/src/service/impala-server.cc M be/src/service/impala-server.h M be/src/service/query-state-record.h M be/src/service/workload-management-fields.cc M be/src/service/workload-management.cc M be/src/util/sharded-query-map-util.h M common/thrift/CMakeLists.txt M common/thrift/CatalogObjects.thrift M common/thrift/Descriptors.thrift M common/thrift/PlanNodes.thrift M common/thrift/Query.thrift A common/thrift/SystemTables.thrift M common/thrift/Types.thrift M fe/src/main/java/org/apache/impala/analysis/Analyzer.java M fe/src/main/java/org/apache/impala/analysis/DescribeTableStmt.java M fe/src/main/java/org/apache/impala/analysis/ShowCreateTableStmt.java M fe/src/main/java/org/apache/impala/authorization/BaseAuthorizationChecker.java M fe/src/main/java/org/apache/impala/catalog/CatalogServiceCatalog.java M fe/src/main/java/org/apache/impala/catalog/Db.java A fe/src/main/java/org/apache/impala/catalog/SystemTable.java M fe/src/main/java/org/apache/impala/planner/SingleNodePlanner.java A fe/src/main/java/org/apache/impala/planner/SystemTableScanNode.java M fe/src/main/java/org/apache/impala/service/BackendConfig.java M fe/src/main/java/org/apache/impala/service/FeSupport.java M fe/src/main/java/org/apache/impala/service/Frontend.java M fe/src/main/java/org/apache/impala/util/CatalogBlacklistUtils.java A fe/src/test/java/org/apache/impala/catalog/SystemTableTest.java M fe/src/test/java/org/apache/impala/planner/PlannerTest.java M fe/src/test/java/org/apache/impala/planner/PlannerTestBase.java A testdata/workloads/functional-planner/queries/PlannerTest/impala-query-live.test A tests/custom_cluster/test_query_live.py M tests/util/workload_management.py 52 files changed, 1,727 insertions(+), 28 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/62/20762/47 -- To view, visit http://gerrit.cloudera.org:8080/20762 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: newpatchset Gerrit-Change-Id: Ie2f9a449f0e5502078931e7f1c5df6e0b762c743 Gerrit-Change-Number: 20762 Gerrit-PatchSet: 47 Gerrit-Owner: Michael Smith <michael.sm...@cloudera.com> Gerrit-Reviewer: Andrew Sherman <asher...@cloudera.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com> Gerrit-Reviewer: Jason Fehr <jf...@cloudera.com> Gerrit-Reviewer: Michael Smith <michael.sm...@cloudera.com> Gerrit-Reviewer: Riza Suminto <riza.sumi...@cloudera.com>