[Impala-ASF-CR] IMPALA-5173: crash with hash join feeding directly into nlj

["Tim Armstrong (Code Review)" <ge...@cloudera.org>]

Tim Armstrong has uploaded a new patch set (#2).

Change subject: IMPALA-5173: crash with hash join feeding directly into nlj
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IMPALA-5173: crash with hash join feeding directly into nlj

The background for this bug is that we can't transfer ownership
of BufferdBlockMgr::Blocks that are attached to RowBatches.

The NestedLoopJoinNode accumulates row batches on its right
side and tries to take ownership of the memory, which doesn't
work as expected in this case.

The fix is to copy the data when we encounter one of these
(likely very rare) cases.

Testing:
Added a regression test that produces a crash before the fix and
succeeds after the fix.

Change-Id: I0c04952e591d17e5ff7e994884be4c4c899ae192
---
M be/src/exec/nested-loop-join-builder.cc
M testdata/workloads/functional-query/queries/QueryTest/spilling.test
2 files changed, 42 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/68/6568/2
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I0c04952e591d17e5ff7e994884be4c4c899ae192
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <ta...@cloudera.com>