Allow /query_summary to be run while query is running.

The exec summary on that page dynamically updates and is useful to see what
is the progress of the query.

Change-Id: I04542426d80091ff2bd4f59e39f126e59ae32e91
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/5097
Tested-by: jenkins
Reviewed-by: Nong Li <nong@cloudera.com>
Remove known references to internal architechture from the Impala respository.

Change-Id: I7a160d00937cd4b5ceab5ce8493740569142702a
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/4928
Reviewed-by: Skye Wanderman-Milne <skye@cloudera.com>
Reviewed-by: Ippokratis Pandis <ipandis@cloudera.com>
Tested-by: jenkins
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/5104
Reviewed-by: Ishaan Joshi <ishaan@cloudera.com>
Reintroduce SEQUENCEFILE writer tests

The sequence writer test had an issue with zlib on certain cluster machines, making
this a flaky test. This has passed several times locally and in private builds. This
re-enables the test because the failures could not be produced in private builds.

Change-Id: I0aeea3a2d000e711e5a84427a7b40592e1eef75b
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/5077
Reviewed-by: Victor Bittorf <victor.bittorf@cloudera.com>
Tested-by: jenkins
Minor improvements to table sink/writer.

Change-Id: I7b354ccb5f1a366fa2fb565d895ac56f744cc9d3
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/5107
Reviewed-by: Henry Robinson <henry@cloudera.com>
Tested-by: jenkins
IMPALA-1442: Ensure that Thrift transports are always buffered

Secure transports using SASL would not be buffered, leading to poor
throughput. This patch ensures that we always buffer output, no matter
what the 'top'-level transport in the stack.

Change-Id: I4f5742292e7340f20538af6eea28c0a3272bcc49
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/5064
Tested-by: jenkins
Reviewed-by: Henry Robinson <henry@cloudera.com>