Todd Lipcon has submitted this change and it was merged.

Change subject: rpc: improve error messages and logging for bad authentication
......................................................................


rpc: improve error messages and logging for bad authentication

* Don't dump the trace for a failed authentication exchange.

* Improve the error messages for GSSAPI failures to only include the
  interesting bit.

* Don't log all authentication failures at ERROR level. Instead, capture
  the error log message and pass it back to the caller of the SASL API
  through a thread-local hack.

  Both clients and servers have provisions to log failed negotiations
  elsewhere, so the log message coming from this context is redundant;
  however, the error text that is passed here is more descriptive than
  the error returned by sasl_errstring().

Change-Id: I3a5156b09fa4f8c7591f4e399ce8cc450c089e88
Reviewed-on: http://gerrit.cloudera.org:8080/4764
Tested-by: Kudu Jenkins
Reviewed-by: Todd Lipcon <t...@apache.org>
---
M src/kudu/rpc/negotiation.cc
M src/kudu/rpc/sasl_client.cc
M src/kudu/rpc/sasl_client.h
M src/kudu/rpc/sasl_common.cc
M src/kudu/rpc/sasl_common.h
M src/kudu/rpc/sasl_rpc-test.cc
M src/kudu/rpc/sasl_server.cc
7 files changed, 190 insertions(+), 103 deletions(-)

Approvals:
  Todd Lipcon: Looks good to me, approved
  Kudu Jenkins: Verified



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Gerrit-MessageType: merged
Gerrit-Change-Id: I3a5156b09fa4f8c7591f4e399ce8cc450c089e88
Gerrit-PatchSet: 7
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Todd Lipcon <t...@apache.org>
Gerrit-Reviewer: Alexey Serbin <aser...@cloudera.com>
Gerrit-Reviewer: Dan Burkert <danburk...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Tidy Bot
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>

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