Flaky TestUdfs.test_udf_update_via_create

 TestUdfs.test_udf_update_via_create[exec_option: {'disable_codegen': True, 'abort_on_error': 1, 'exec_single_node_rows_threshold': 0, 'batch_size': 0, 'num_nodes': 0} | table_format: text/none] 
[gw6] linux2 -- Python 2.7.6 /home/ubuntu/tmp.I6bbQ76esa/bin/../infra/python/env/bin/python
query_test/test_udfs.py:217: in test_udf_update_via_create
    exec_options, query_template.format(new_function_name), ["New UDF"])
query_test/test_udfs.py:284: in __run_query_all_impalads
    assert result.data == expected
E   assert ['Old UDF'] == ['New UDF']
E     At index 0 diff: 'Old UDF' != 'New UDF'
E     Use -v to get the full diff
---------------------------- Captured stderr setup -----------------------------
SET sync_ddl=False;
-- executing against localhost:21000
DROP DATABASE IF EXISTS `test_udf_update_via_create_d6b3ee5e` CASCADE;

SET sync_ddl=False;
-- executing against localhost:21000
CREATE DATABASE `test_udf_update_via_create_d6b3ee5e`;

MainThread: Created database "test_udf_update_via_create_d6b3ee5e" for test ID "query_test/test_udfs.py::TestUdfs::()::test_udf_update_via_create[exec_option: {'disable_codegen': True, 'abort_on_error': 1, 'exec_single_node_rows_threshold': 0, 'batch_size': 0, 'num_nodes': 0} | table_format: text/none]"
----------------------------- Captured stderr call -----------------------------
SET batch_size=0;
SET num_nodes=0;
SET sync_ddl=1;
SET disable_codegen=True;
SET abort_on_error=1;
SET exec_single_node_rows_threshold=0;
-- executing against localhost:21000
drop function if exists `test_udf_update_via_create_d6b3ee5e`.`udf_update_test_create1`();

SET batch_size=0;
SET num_nodes=0;
SET sync_ddl=1;
SET disable_codegen=True;
SET abort_on_error=1;
SET exec_single_node_rows_threshold=0;
-- executing against localhost:21000
drop function if exists `test_udf_update_via_create_d6b3ee5e`.`udf_update_test_create2`();

SET batch_size=0;
SET num_nodes=0;
SET sync_ddl=1;
SET disable_codegen=True;
SET abort_on_error=1;
SET exec_single_node_rows_threshold=0;
-- executing against localhost:21000
create function `test_udf_update_via_create_d6b3ee5e`.`udf_update_test_create1`() returns string LOCATION '/test-warehouse/impala-hive-udfs3.jar' SYMBOL='org.apache.impala.TestUpdateUdf';

MainThread: Found 3 impalad/1 statestored/1 catalogd process(es)
-- connecting to: ip-172-31-13-247:21000
SET batch_size=0;
SET num_nodes=0;
SET sync_ddl=1;
SET disable_codegen=True;
SET abort_on_error=1;
SET exec_single_node_rows_threshold=0;
-- executing against ip-172-31-13-247:21000
select `test_udf_update_via_create_d6b3ee5e`.`udf_update_test_create1`();

-- connecting to: ip-172-31-13-247:21001
SET batch_size=0;
SET num_nodes=0;
SET sync_ddl=1;
SET disable_codegen=True;
SET abort_on_error=1;
SET exec_single_node_rows_threshold=0;
-- executing against ip-172-31-13-247:21001
select `test_udf_update_via_create_d6b3ee5e`.`udf_update_test_create1`();

-- connecting to: ip-172-31-13-247:21002
SET batch_size=0;
SET num_nodes=0;
SET sync_ddl=1;
SET disable_codegen=True;
SET abort_on_error=1;
SET exec_single_node_rows_threshold=0;
-- executing against ip-172-31-13-247:21002
select `test_udf_update_via_create_d6b3ee5e`.`udf_update_test_create1`();

SET batch_size=0;
SET num_nodes=0;
SET sync_ddl=1;
SET disable_codegen=True;
SET abort_on_error=1;
SET exec_single_node_rows_threshold=0;
-- executing against localhost:21000
create function `test_udf_update_via_create_d6b3ee5e`.`udf_update_test_create2`() returns string LOCATION '/test-warehouse/impala-hive-udfs3.jar' SYMBOL='org.apache.impala.TestUpdateUdf';

MainThread: Found 3 impalad/1 statestored/1 catalogd process(es)
-- connecting to: ip-172-31-13-247:21000
SET batch_size=0;
SET num_nodes=0;
SET sync_ddl=1;
SET disable_codegen=True;
SET abort_on_error=1;
SET exec_single_node_rows_threshold=0;
-- executing against ip-172-31-13-247:21000
select `test_udf_update_via_create_d6b3ee5e`.`udf_update_test_create2`();