Grant Henke has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/9654


Change subject: java: key ConnectionCache by address, improve stringification
......................................................................

java: key ConnectionCache by address, improve stringification

This changes the ConnectionCache in the Java client to be keyed by
InetSocketAddress instead of server UUID. Although we currently assume
that an address and UUID have a 1:1 correspondence, the logical purpose
of the connection cache is to cache a connection to a specific server
endpoint, and if a server were to re-register at a new IP, we'd really
need to reconnect.

Along the way this also adds and improves toString() methods for a
number of core structures in the Java client. These new stringifications
helped me debug a recent issue in the client where it wasn't clear that
we were connecting to the wrong host.

Change-Id: I431b5b6b8af6b81e6ab494d7f84fa2260bb0f941
Reviewed-on: http://gerrit.cloudera.org:8080/9643
Tested-by: Kudu Jenkins
Reviewed-by: Grant Henke <[email protected]>
(cherry picked from commit 8204f43f0204c172c4a799f9ccda0592d3b02138)
---
M java/kudu-client/src/main/java/org/apache/kudu/client/AsyncKuduScanner.java
M java/kudu-client/src/main/java/org/apache/kudu/client/Connection.java
M java/kudu-client/src/main/java/org/apache/kudu/client/ConnectionCache.java
M java/kudu-client/src/main/java/org/apache/kudu/client/RemoteTablet.java
M java/kudu-client/src/main/java/org/apache/kudu/client/ServerInfo.java
M java/kudu-client/src/main/java/org/apache/kudu/client/TableLocationsCache.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestConnectionCache.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestRemoteTablet.java
M java/kudu-client/src/test/java/org/apache/kudu/client/TestServerInfo.java
A 
java/kudu-client/src/test/java/org/apache/kudu/client/TestTableLocationsCache.java
10 files changed, 167 insertions(+), 87 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/54/9654/1
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Gerrit-Project: kudu
Gerrit-Branch: branch-1.7.x
Gerrit-MessageType: newchange
Gerrit-Change-Id: I431b5b6b8af6b81e6ab494d7f84fa2260bb0f941
Gerrit-Change-Number: 9654
Gerrit-PatchSet: 1
Gerrit-Owner: Grant Henke <[email protected]>
Gerrit-Reviewer: Todd Lipcon <[email protected]>

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