Michael Smith has uploaded this change for review. ( http://gerrit.cloudera.org:8080/22804
Change subject: IMPALA-13631: (Addendum) Test slow concurrent alters ...................................................................... IMPALA-13631: (Addendum) Test slow concurrent alters Adds a test that multiple slow concurrent alters complete in parallel rather than being executed sequentially. The test creates tables, and ensures Impala's catalog is up-to-date for their creation so that starting ALTER TABLE will be fast. Then starts two ALTER TABLE RENAMES asynchronously - with debug_action ensuring each takes at least 5 seconds - and waits for them to finish. Timeouts are chosen so that there's a high likelihood one would fail if ALTERs were serialized, while providing sufficient time for a busy system to respond. The 1st timeout is 10 seconds, which prior to IMPALA-13631 would sometimes fail if the 2nd ALTER started first. The 2nd timeout ensures the other ALTER finishes less than 5 seconds after the first, which is only possible if they execute the debug action concurrently. Combined they give concurrent ALTERs 5 seconds of additional overhead for processing each of them, beyond the debug action. Change-Id: I87d077aaa295943a16e6da60a2755dd289f3a132 --- M fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java M fe/src/main/java/org/apache/impala/util/DebugUtils.java M tests/metadata/test_ddl.py 3 files changed, 33 insertions(+), 2 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/04/22804/1 -- To view, visit http://gerrit.cloudera.org:8080/22804 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: newchange Gerrit-Change-Id: I87d077aaa295943a16e6da60a2755dd289f3a132 Gerrit-Change-Number: 22804 Gerrit-PatchSet: 1 Gerrit-Owner: Michael Smith <[email protected]>
