Alexey Serbin has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/6816

Change subject: WIP [java] re-acquire authn token if expired
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WIP [java] re-acquire authn token if expired

This patch introduces automatic authn token re-acquisition when current
authn token expires.  The client automatically retries the RPC that
hits the token expiration error.

Added a test to exercise the new retry logic for token expiration in
case of a basic workload scenario.

In this commit I also added a few lines of code to retry RPC for the
case if server sends ERROR_UNAVAILABLE error code (which is a broader
version of its ERROR_SERVER_TOO_BUSY counterpart).

WIP: there are a couple of TODOs to address
  * synchronization of setting/resetting authn token in the client
    context
  * a test scenario with more exhaustive workload

Change-Id: Iad5bef1d06708215839037741cd3bc213e130af2
---
M java/kudu-client/src/main/java/org/apache/kudu/client/AsyncKuduClient.java
M java/kudu-client/src/main/java/org/apache/kudu/client/Negotiator.java
M java/kudu-client/src/main/java/org/apache/kudu/client/TabletClient.java
A 
java/kudu-client/src/test/java/org/apache/kudu/client/TestAuthnTokenReacquire.java
4 files changed, 231 insertions(+), 18 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/16/6816/1
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Gerrit-MessageType: newchange
Gerrit-Change-Id: Iad5bef1d06708215839037741cd3bc213e130af2
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Alexey Serbin <aser...@cloudera.com>

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