Hello David Ribeiro Alves, Kudu Jenkins,

I'd like you to do a code review.  Please visit

    http://gerrit.cloudera.org:8080/6660

to review the following change.

Change subject: KUDU-1933. consensus: Avoid and repair integer overflow in log 
index
......................................................................

KUDU-1933. consensus: Avoid and repair integer overflow in log index

We observed a crash on a long-running master server that looked like the
following:

  F0308 00:25:53.568773  7655 log_index.cc:171] Check failed: log_index > 0 
(-2147483648 vs. 0)

It turns out that this was caused due to integer overflow on the log
index field. This patch fixes this type of truncation in a couple of
places (LogReader and MakeOpId()) and adds a couple of new tests that
fail without both of those fixes.

This patch also adds "repair" logic in log replay during tablet
bootstrap that "reverts" integer overflow when it is detected while
rewriting the log entry.

Finally, this patch includes some test helper fixes to avoid log index
integer truncation in future tests.

Change-Id: I284edbde51dc50fb2f98acc83cdcc3891d37863f
Reviewed-on: http://gerrit.cloudera.org:8080/6376
Tested-by: Kudu Jenkins
Reviewed-by: David Ribeiro Alves <dral...@apache.org>
(cherry picked from commit 8363b74506f8513e2fa9dbf772e30d0abce4e444)
---
M src/kudu/consensus/consensus-test-util.h
M src/kudu/consensus/log-test-base.h
M src/kudu/consensus/log-test.cc
M src/kudu/consensus/log_cache-test.cc
M src/kudu/consensus/log_reader.cc
M src/kudu/consensus/log_reader.h
M src/kudu/consensus/opid_util.cc
M src/kudu/consensus/opid_util.h
M src/kudu/integration-tests/ts_recovery-itest.cc
M src/kudu/tablet/tablet_bootstrap-test.cc
M src/kudu/tablet/tablet_bootstrap.cc
11 files changed, 236 insertions(+), 27 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/60/6660/1
-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I284edbde51dc50fb2f98acc83cdcc3891d37863f
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: branch-1.2.x
Gerrit-Owner: Mike Percy <mpe...@apache.org>
Gerrit-Reviewer: David Ribeiro Alves <dral...@apache.org>
Gerrit-Reviewer: Kudu Jenkins

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