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DRILL-4048: Fix reading required dictionary encoded varbinary data in parquet files after recent update

Fix was small, this update is a little larger than necessary because I was hoping to create

a unit test by modifying the one I had added in the earlier patch with the version upgrade.

Unfortunately we don't have a good way to generate Parquet files with required columns from

unit tests right now. So I just added a smaller subset of the binary file that was posted on

the JIRA issue. The refactoring of the earlier test was still useful for readability,

so I kept it in.

Add synchronization to DrillBuf.retain() to avoid contention issues.

Add assertion around QueryDataBatch release to ensure that we're not releasing the buffers twice.

DRILL-4049: Terminate StatusThread when Workmanager is closed.

Avoid excessive growth in threads with long-lived test JVMs.

DRILL-4046: Upgrade Joda to later version (avoid contention issues)

Added other meetup groups

Applying DRILL-4020 (The not-equal operator returns incorrect results when used on the HBase row key)

Applying DRILL-3621 (Wrong results when Drill on HBase query contains rowkey "or" or "IN") to MapRDB plugin

Already in json_support branch, exclude while merging.

remove empty array stuff and launchctl

DRILL-4041 & DRILL-4057: Disable RPC thread offload until concurrency bug is found.

DRILL-4085: Disable RPC thread offload until concurrency bug is found.

DRILL-4042: Unable to run sqlline in embedded mode on Windows

Use newer version of hadoop-winutils

MD-524: Drill API change broke the MapRDB Plugin

DRILL-4040: Build failure on master

This closes #244

DRILL-4032: Check if a new vector was created to determine if allocation is necessary in MapWriter closes #241

DRILL-4031: Log warning and ignore columns returned from JDBC source that are unsupported.

This closes #240

DRILL-4020: The not-equal operator returns incorrect results when used on the HBase row key

- Added a condition that checks if the filter to the scan specification doesn't have NOT_EQUAL operator

- Added testFilterPushDownRowKeyNotEqual() to TestHBaseFilterPushDown

This closes #309

DRILL-3171: handle concurrent Zookeeper node creation gracefully

DRILL-3765: Move partitioning pruning to HepPlanner to avoid the performance overhead for redundant rule execution.

Add fall back option in planner.

close apache/drill#255

DRILL-3423: Adding HTTPd Log Parsing functionality including full pushdown, type remapping and wildcard support. Pushed through the requested columns for push down to the parser. Added more tests to cover a few more use cases. Ensured that user query fields are now completely consistent with returned values.

DRILL-951: Add support for csv header row parsing

This closes #232

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    /exec/java-exec/src/test/resources/store/text/data/cars.csvh
minor typo fix

DRILL-4025: Create FileSelection object with the appropriate file statuses

DRILL-3810: Add Avro schema support

Also updates the FileFormatPlugin to support providing schema.

DRILL-3956: Add support for MySQL text type

DRILL-4006: Reallocate offset vector in repeated vectors when index is beyond the current capacity

Author: Steven Phillips <smp@apache.org>

This closes #243, #242

DRILL-4000: Ensure storage plugins are not needlessly created. Add start and close capability to storage plugins.

This closes #227

Add a new configuration based map so any configurations that are passed to a node can leverage existing storage plugins.

Update FileSystemConfig to correctly implement hashcode()

Update StoragePlugin interface to extends Autocloseable and add start() method.

Update Mongo plugin to close clients when closing plugin.

DRILL-3994: make classpath scanning work on windows

DRILL-3634: Add number of partitions information in the plan for hive scans

closes #231

DRILL-4053: Reduce metadata cache file size. Save a merged schema instead of repeating for every row group. Save maxValue in a row group iff minVal equals maxVal and null otherwise. Maintain backward compatibility with older version. This closes #254