Hello Quanlong Huang, Riza Suminto, Jason Fehr, Joe McDonnell, Impala Public 
Jenkins,

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/22738

to look at the new patch set (#3).

Change subject: IMPALA-915: Cancel catalog ops for queries
......................................................................

IMPALA-915: Cancel catalog ops for queries

Adds support to cancel metadata operations with catalogd by sending a
Cancel request to catalogd for the relevant query ID. Registers Java
Threads executing select catalog operations by their query ID.

UserCancelledException is implemented as a RuntimeException for the
moment because exception propagation requires a lot of updates; this is
similar to LocalCatalogException, and both should be cleaned up.

Retries piggybacked queries that fail because the catalog load was
interrupted.

Adds a ImpylaHS2ResultSet.__str__ method to simplify interacting with
HS2 result sets in tests.

Testing:
- added local catalog mode tests for interrupting metadata operations

Change-Id: Iab22855bd2d63b64da008b52aa33230a6f422537
---
M be/src/catalog/catalog-server.cc
M be/src/catalog/catalog-service-client-wrapper.h
M be/src/catalog/catalog.cc
M be/src/catalog/catalog.h
M be/src/exec/catalog-op-executor.cc
M be/src/exec/catalog-op-executor.h
M be/src/service/client-request-state.cc
M be/src/service/fe-support.cc
M common/thrift/CatalogService.thrift
M fe/src/main/java/org/apache/impala/catalog/CatalogServiceCatalog.java
M fe/src/main/java/org/apache/impala/catalog/FeCatalog.java
M fe/src/main/java/org/apache/impala/catalog/ImpaladCatalog.java
M fe/src/main/java/org/apache/impala/catalog/ParallelFileMetadataLoader.java
M fe/src/main/java/org/apache/impala/catalog/local/CatalogdMetaProvider.java
M fe/src/main/java/org/apache/impala/catalog/local/LocalCatalog.java
M fe/src/main/java/org/apache/impala/catalog/local/MetaProvider.java
M fe/src/main/java/org/apache/impala/common/UserCancelledException.java
M fe/src/main/java/org/apache/impala/service/Canceller.java
M fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java
M fe/src/main/java/org/apache/impala/service/JniCatalog.java
M tests/common/impala_connection.py
M tests/common/impala_test_suite.py
M tests/custom_cluster/test_web_pages.py
M tests/util/web_pages_util.py
24 files changed, 502 insertions(+), 33 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/38/22738/3
--
To view, visit http://gerrit.cloudera.org:8080/22738
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Iab22855bd2d63b64da008b52aa33230a6f422537
Gerrit-Change-Number: 22738
Gerrit-PatchSet: 3
Gerrit-Owner: Michael Smith <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Jason Fehr <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Michael Smith <[email protected]>
Gerrit-Reviewer: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>

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