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[IMPALA-7585] Always set user credentials after creating a KRPC proxy - Impala - [issue]
...kudu::rpc::Proxy ctor may fail in GetLoggedInUser() for various reason:Error calling getpwuid_r(): No such file or directory (error 2). This resulted in an empty user name being used in kudu...    Author: Michael Ho , 2018-09-18, 02:04
[IMPALA-7464] DCHECK(!released_exec_resources_) is triggered when ExecFInstance() RPC times out - Impala - [issue]
...Hit the following when running custom_cluster_test/test_rpc_timeout.pyF0817 20:04:25.451669   311] Check failed: !released_exec_resources_void QueryState::AcquireExec...    Author: Michael Ho , 2018-09-14, 17:54
[IMPALA-7565] Extends TAcceptQueueServer connection_setup_pool to be multi-threaded - Impala - [issue]
...In TAcceptQueueServer.cpp, we currently have one thread in the connection_setup_pool for handling connection establishment.  // Only using one thread here is sufficient for performance,...    Author: Michael Ho , 2018-09-13, 06:47
[IMPALA-7566] TAcceptQueueServer connection setup should have timeout - Impala - [issue]
...Currently, there is no timeout when establishing a connection with an Impala client. For instance, if a client freezes whether (intentionally or unintentionally) in the middle of connection ...    Author: Michael Ho , 2018-09-13, 06:43
[expand - 2 more] - FE build failure - Impala - [mail # dev]
...Thanks a lot Phil for helping out. Also learned something new today :-)On Wed, Sep 5, 2018 at 2:15 PM Philip Zeyliger  wrote:> Using 'mvn -U' seems to have resolved the issue for Mic...
   Author: Michael Ho , 2018-09-05, 21:23
[IMPALA-6380] Replace FunctionContext::IsArgConstant(int i) with constant during codegen - Impala - [issue]
...There are few places in the string related built-in functions which check whether the input argument is constant per row:TimestampVal TimestampFunctions::ToTimestamp(FunctionContext* context...    Author: Michael Ho , 2018-08-30, 21:13
Issues with query/fragment lifecycle on trunk? - Impala - [mail # dev]
...FWIW, please see the discussion at about how "stuck IO" mayrender cancellation in HDFS scan node ineffective. We have seen usersreported simi...
   Author: Michael Ho , 2018-08-30, 19:35
[IMPALA-4269] Codegen for Merging-Exchange node - Impala - [issue]
...We should codegen the TupleRowComparator for merging-exchange operator. This should help a lot for queries such as:SELECT *FROM   (SELECT Rank()           ...    Author: Michael Ho , 2018-08-30, 18:50
[IMPALA-4291] Lazy creation of IRFunction::Type to Function* mapping - Impala - [issue]
...For simple queries with one or two functions to codegen, we spent about 23ms or more out of 40ms of codegen time in preparation. We can save some time by not eagerly populating the map of IR...    Author: Michael Ho , 2018-08-30, 18:49
[IMPALA-7504] ParseKerberosPrincipal() should use krb5_parse_name() instead - Impala - [issue]
...Todd Lipcon pointed out during code review that we should be using krb5_parse_name() to parse the principal instead of creating our ownI wonder whether we should just be using krb5_parse_nam...    Author: Michael Ho , 2018-08-28, 23:52