Author: elserj
Date: Mon Feb 16 21:17:45 2015
New Revision: 1660205
URL: http://svn.apache.org/r1660205
Log:
Some bug fixes
Modified:
accumulo/site/trunk/content/release_notes/1.6.2.mdtext
Modified: accumulo/site/trunk/content/release_notes/1.6.2.mdtext
URL:
http://svn.apache.org/viewvc/accumulo/site/trunk/content/release_notes/1.6.2.mdtext?rev=1660205&r1=1660204&r2=1660205&view=diff
==============================================================================
--- accumulo/site/trunk/content/release_notes/1.6.2.mdtext (original)
+++ accumulo/site/trunk/content/release_notes/1.6.2.mdtext Mon Feb 16 21:17:45
2015
@@ -28,11 +28,35 @@ the improvements with very little concer
are seeking to upgrade to 1.6 should consider 1.6.2 the starting point over
1.6.0 or 1.6.1. For
information about improvements since Accumulo 1.5, see the [1.6.0][3] and
[1.6.1][4] release notes.
-## Performance Improvements
+## Notable Bug Fixes
+
+### Only first ZooKeeper server is used
-Apache Accumulo 1.6.1 includes a number of performance-related fixes over
previous versions.
-Many of these improvements were also included in the recently released Apache
Accumulo 1.5.2.
+In constructing a `ZooKeeperInstance`, the user provides a comma-separated
list of addresses for ZooKeeper
+servers. 1.6.0 and 1.6.1 incorrectly truncated the provided list of ZooKeeper
servers used to the first. This
+would cause clients to fail when the first ZooKeeper server in the list became
unavailable and not properly
+load balance requests to all available servers in the quorum.
[ACCUMULO-3218][5] fixes the parsing of
+the ZooKeeper quorum list to use all servers, not just the first.
+
+### Incorrectly handled ZooKeeper exception
+
+Use of ZooKeeper's API requires very careful exception handling as some thrown
exceptions from the ZooKeeper
+API are considered "normal" and must be retried by the client. In 1.6.1,
Accumulo improved its handling of
+these "expected failures" to better insulate calls to ZooKeeper; however, the
wrapper which sets data to a ZNode
+incorrectly handled all cases. [ACCUMULO-3448][6] fixed the implementation of
`ZooUtil.putData(...)` to handle
+the expected error conditions correctly.
+
+### `scanId` is not set in `ActiveScan`
+
+The `ActiveScan` class is the returned object by
`InstanceOperations.listScans`. This class represents a
+"scan" running on Accumulo servers, either from a `Scanner` or `BatchScanner`.
The `ActiveScan` class
+is meant to represent all of the information that represents the scan and can
be useful to administrators
+or DevOps-types to observe and act on scans which are running for excessive
periods of time. [ACCUMULO-2641][7]
+fixes `ActiveScan` to ensure that the internal identifier `scanId` is properly
set.
+
+## Performance Improvements
+Apache Accumulo 1.6.2 includes a number of performance-related fixes over
previous versions.
### Improvement 1
@@ -42,12 +66,6 @@ Many of these improvements were also inc
### Improvement 1
-## Notable Bug Fixes
-
-### Bug fix 1
-
-### Bug fix 2
-
## Documentation
The following documentation updates were made:
@@ -89,4 +107,7 @@ and, in HDFS High-Availability instances
[1]: http://semver.org
[2]: https://github.com/apache/accumulo#api
[3]: http://accumulo.apache.org/release_notes/1.6.0.html
-[4]: http://accumulo.apache.org/release_notes/1.6.1.html
\ No newline at end of file
+[4]: http://accumulo.apache.org/release_notes/1.6.1.html
+[5]: https://issues.apache.org/jira/browse/ACCUMULO-3218
+[6]: https://issues.apache.org/jira/browse/ACCUMULO-3448
+[7]: https://issues.apache.org/jira/browse/ACCUMULO-2641
\ No newline at end of file
