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Mala Chikka Kempanna
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[IMPALA-5392] Stack depth for threads printed in the Catalog UI under JVM Threads is not deep enough
...The depth of the call stack is not sufficient to understand the status of the system. SummaryCPU time (s)User time (s)Blocked time (ms)Blocked timesNative"Thread-11" Id=39 RUNNABLE (in nativ...
, 2017-11-17, 01:07
[IMPALA-5298] Investigate and fix from_unixtime() slowness, currently 100x slower than scanning Bigint
...Noticed that applying from_unixtime against a Bigint results in ~100x slowdown compared to just scanning the Bigint columnselect max(from_unixtime (l_orderkey)) from lineitem where l_shipdat...
, 2017-11-14, 13:41
- [mail # dev]
...It should be safe to apply this setting to all machine sizes.This setting is mostly to workaround S3 connector timeouts failures thatlook like the one below.The default value is too low to r...
, 2017-11-08, 17:20
long codegen time while codegen disabled
- [mail # dev]
...From the profile codegen is disabled for HDFS_SCAN_NODE (id=8) and not theentire query.If you wish to disable codegen run "set disable_codegen=1;" beforeexecuting the query from impala-shell...
, 2017-11-08, 16:30
[IMPALA-6165] Crash in kudu::rpc::InboundCall::SerializeResponseBuffer inbound_call.cc:149
...While running concurrent TPCDS queries hit the crash below Stack#0 0x0000003a7c232625 in raise () from /lib64/libc.so.6#1 0x0000003a7c233e05 in abort () from /lib64/libc.so.6#2 &...
, 2017-11-07, 23:26
[IMPALA-6048] Queries make very slow progress and report WaitForRPC() stuck for too long
...When running 32 concurrent queries from TPCDS a couple of instances from TPC-DS Q78 9 hours to finish and it appeared to be hung.On an idle cluster the query finished in under 5 minutes, pro...
, 2017-11-07, 23:16
[IMPALA-5387] Excessive logging to INFO and ERROR files when reading S3 data
...While querying data in S3 the impalad.ERROR file is flooded with the messages like the one below, are those expected?UnsupportedOperationException: Byte-buffer read unsupported by input stre...
, 2017-11-07, 11:27
[IMPALA-6142] Extend compute stats DDL to create statistics against all tables in a database
...Extend compute statistics DDL to compute stats against all tables in current database.This should simplify the use case for transient clusters where users need to compute some states against...
, 2017-11-06, 19:08
[IMPALA-6144] Coordinator threads that publish RuntimeFilters continue to run after query failure/cancellation
...When running highly concurrent queries with lots of joins on a large cluster I noticed that there is lots of untracked memory on the coordinator node. Experiments showed that the majority of...
, 2017-11-06, 18:10
[IMPALA-5142] EventSequence::MarkEvent() may record concurrent events out of serialized order
...When the event for first dynamic filter is received ahead of all fragments started the query timeline prints a negative time value for "fragment instances started" ...
, 2017-11-06, 02:05
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