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new cf3e4b2a Started release notes for 2.1.2 (#391)
cf3e4b2a is described below
commit cf3e4b2a193b022dffc38ac2e380e8765c4a5a5c
Author: Dave Marion <dlmar...@apache.org>
AuthorDate: Mon Aug 14 16:08:47 2023 -0400
Started release notes for 2.1.2 (#391)
Co-authored-by: Dom G. <domgargu...@apache.org>
Co-authored-by: Christopher Tubbs <ctubb...@apache.org>
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+---
+title: Apache Accumulo 2.1.2
+sortableversion: '02.01.02'
+LTM: true
+draft: true
+---
+## About
+
+Apache Accumulo 2.1.2 is a patch release of the 2.1.0 LTM line. It contains
+bug fixes and minor enhancements. This version supersedes 2.1.1. Users
+upgrading to 2.1 should upgrade directly to this version instead of 2.1.1.
+
+Included here are some highlights of the most interesting bugs fixed and
features
+added in 2.1.2. For the full set of bug fixes, please see the commit history
+or issue tracker.
+
+NOTE: This 2.1 release also includes any applicable bug fixes and improvements
+that occurred in 1.10.3 and earlier.
+
+### Notable Improvements
+
+Improvements that affect performance:
+
+* {% ghi 3499 %}, {% ghi 3543 %} {% ghi 3549 %} Made some optimizations around
the processing of file
+references in the GC code.
+
+* {% ghi 3500 %}, {% ghi 3509 %} TabletFile constructor was calling
Path.getParent() which was spending
+a lot of time performing Path validation. Modified the constructor to reduce
the calls to Path.getParent.
+
+* {% ghi 3541 %}, {% ghi 3542 %} The TabletGroupWatcher threads in the Manager
are responsible for tablet
+state and for making sure that tablets are balanced and assigned. The
TabletGroupWatcher's iterate over
+all of the tablets, then wait for 60s before beginning the next iteration.
Backported a new property,
+MANAGER_TABLET_GROUP_WATCHER_INTERVAL, to make this wait time configurable.
+
+Improvements that help with administration:
+
+* {% ghi 3678 %}, {% ghi 3683 %} Added validation of property
table.class.loader.context when it is set.
+If the context name is null, an empty string, results in an exception creating
the classloader for the
+context, or if the resulting classloader is null, then an exception will be
returned and the property
+will not be set.
+
+* {% ghi 3548 %}, {% ghi 3561 %} Displayed Manager state prominently on the
Monitor UI.
+
+* {% ghi 3383 %}, {% ghi 3680 %} Prompt the user for confirmation when they
attempt to set a deprecated
+property in the Shell as a way to get them to use the non-deprecated property.
+
+* {% ghi 3488 %}, {% ghi 3612 %} Made tserver scans and compaction columns
numerically sortable on the
+Monitor UI.
+
+* {% ghi 3233 %}, {% ghi 3562 %} Added copy-properties option to
createnamespace and createtable shell
+commands
+
+### Notable Bug Fixes
+
+* {% ghi 3674 %}, {% ghi 3677 %}, {% ghi 3685 %} An invalid context
classloader property was preventing
+a minor compaction output file from being created, because the volume chooser
class could not be loaded,
+which failed the minor compaction thread. Once the minor compaction thread is
dead, it will prevent future minor compactions from starting, subsequently
preventing the tablet from being closed normally. The fixes here
+include catching a broader range of exceptions in the minor compaction thread
in an attempt to save it
+from dying and initiating a minor compaction before closing the compactable
object in the tablet.
+
+* {% ghi 3630 %}, {% ghi 3631 %} ClientContext incorrectly converting
BatchWriter latency and timeout values
+
+* {% ghi 3617 %}, {% ghi 3622 %} Close LocalityGroupReader when IOException is
thrown to release reference
+to a possibly corrupted stream in a cached block file.
+
+* {% ghi 3570 %}, {% ghi 3571 %} Fix TabletGroupWatcher shutdown order
+
+* {% ghi 3569 %}, {% ghi 3579 %} {% ghi 3644 %} Changes to ensure that scan
sessions are cleaned up
+
+* {% ghi 3553 %}, {% ghi 3555 %} A failed user compaction would not retry and
would hang
+
+* {% ghi 3600 %} Normalized metric labels and structure
+
+## Upgrading
+
+View the [Upgrading Accumulo documentation][upgrade] for guidance.
+
+## 2.1.2 GitHub Project
+
+[All tickets related to 2.1.2.][project]
+
+
+[LTM]: {{ site.baseurl }}/contributor/versioning#LTM
+[upgrade]: /docs/2.x/administration/upgrading
+[project]: https://github.com/apache/accumulo/projects/29
