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Todd Lipcon 3673bfc241 HBASE-20403. Fix race between prefetch task and non-pread HFile reads 
With prefetch-on-open enabled, the task doing the prefetching was using
non-positional (i.e. streaming) reads. If the main (non-prefetch) thread
was also using non-positional reads, these two would conflict, because
inputstreams are not thread-safe for non-positional reads.

In the case of an encrypted filesystem, this could cause JVM crashes,
etc, as underlying cipher buffers were freed underneath the racing
threads. In the case of a non-encrypted filesystem, less severe errors
would be thrown. The included unit test reproduces the latter case.

(cherry picked from commit 025ddce868)
Signed-off-by: Todd Lipcon <todd@cloudera.com>
 		2018-06-25 12:12:30 -07:00
bin HBASE-20615 emphasize shaded artifacts in client tarball. 2018-06-18 14:03:28 -07:00
conf HBASE-12882 Log level now configurable from outside Log4j configuration 2018-06-02 11:29:40 +02:00
dev-support HBASE-20334 add a test that verifies basic client and MR integration 2018-06-18 14:03:51 -07:00
hbase-annotations HBASE-20212 Make all Public classes have InterfaceAudience category 2018-03-22 18:09:54 +08:00
hbase-archetypes HBASE-20544 Make HBTU default to random ports. 2018-05-09 23:45:39 -07:00
hbase-assembly HBASE-20615 emphasize shaded artifacts in client tarball. 2018-06-18 14:03:28 -07:00
hbase-build-configuration HBASE-20707 Move MissingSwitchDefault case check 2018-06-11 10:13:29 -05:00
hbase-build-support HBASE-20155 update branch-2 version to 2.1.0-SNAPSHOT 2018-03-08 08:44:30 -08:00
hbase-checkstyle HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-client HBASE-20770 WAL cleaner logs way too much; gets clogged when lots of work to do 2018-06-25 12:12:03 -07:00
hbase-common HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-endpoint HBASE-19764 Fix Checkstyle errors in hbase-endpoint 2018-06-24 10:59:37 +02:00
hbase-examples HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-external-blockcache HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-hadoop-compat HBASE-20233 Remove redundant region server metric 2018-04-14 08:30:32 -07:00
hbase-hadoop2-compat HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-http HBASE-20478 Update checkstyle to v8.2 2018-06-18 14:02:40 -07:00
hbase-it HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-mapreduce HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-metrics HBASE-20212 Make all Public classes have InterfaceAudience category 2018-03-22 18:09:54 +08:00
hbase-metrics-api HBASE-20212 Make all Public classes have InterfaceAudience category 2018-03-22 18:09:54 +08:00
hbase-procedure HBASE-20745 Log when master proc wal rolls 2018-06-19 19:53:29 -07:00
hbase-protocol HBASE-19504 Add TimeRange support into checkAndMutate 2018-03-24 00:05:22 +08:00
hbase-protocol-shaded HBASE-20752 Make sure the regions are truly reopened after ReopenTableRegionsProcedure 2018-06-22 14:06:29 +08:00
hbase-replication HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-resource-bundle HBASE-20681 Explicitly include hamcrest in binary tarball 2018-06-15 11:12:57 -05:00
hbase-rest HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-rsgroup HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-server HBASE-20403. Fix race between prefetch task and non-pread HFile reads 2018-06-25 12:12:30 -07:00
hbase-shaded HBASE-20333 Provide a shaded client that allows downstream to provide Hadoop needs. 2018-06-18 14:03:13 -07:00
hbase-shell HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-testing-util HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-thrift HBASE-20332 shaded mapreduce module shouldn't include hadoop 2018-06-18 14:02:48 -07:00
hbase-zookeeper HBASE-20561 The way we stop a ReplicationSource may cause the RS down 2018-06-13 18:05:27 +08:00
src/main HBASE-20656 Validate pre-2.0 coprocessors against HBase 2.0+ 2018-06-11 10:32:40 -05:00
.gitattributes HBASE-6816. [WINDOWS] line endings on checkout for .sh files 2013-01-23 19:30:14 +00:00
.gitignore HBASE-19637 Add .checkstyle to gitignore 2017-12-27 11:24:58 +08:00
.pylintrc HBASE-18041 Add .pylintrc to HBase 2017-06-28 12:26:29 -05:00
CHANGES.txt HBASE-18548 Move sources of website gen and check jobs into source control 2017-12-19 23:40:46 +08:00
LICENSE.txt HBASE-18548 Move sources of website gen and check jobs into source control 2017-12-19 23:40:46 +08:00
NOTICE.txt HBASE-20088 Update NOTICE.txt year 2018-02-27 09:57:28 -05:00
README.txt HBASE-18548 Move sources of website gen and check jobs into source control 2017-12-19 23:40:46 +08:00
pom.xml HBASE-20615 emphasize shaded artifacts in client tarball. 2018-06-18 14:03:28 -07:00

README.txt 

Apache HBase [1] is an open-source, distributed, versioned, column-oriented
store modeled after Google' Bigtable: A Distributed Storage System for
Structured Data by Chang et al.[2]  Just as Bigtable leverages the distributed
data storage provided by the Google File System, HBase provides Bigtable-like
capabilities on top of Apache Hadoop [3].

To get started using HBase, the full documentation for this release can be
found under the doc/ directory that accompanies this README.  Using a browser,
open the docs/index.html to view the project home page (or browse to [1]).
The hbase 'book' at http://hbase.apache.org/book.html has a 'quick start'
section and is where you should being your exploration of the hbase project.

The latest HBase can be downloaded from an Apache Mirror [4].

The source code can be found at [5]

The HBase issue tracker is at [6]

Apache HBase is made available under the Apache License, version 2.0 [7]

The HBase mailing lists and archives are listed here [8].

The HBase distribution includes cryptographic software. See the export control
notice here [9].

1. http://hbase.apache.org
2. http://research.google.com/archive/bigtable.html
3. http://hadoop.apache.org
4. http://www.apache.org/dyn/closer.cgi/hbase/
5. https://hbase.apache.org/source-repository.html
6. https://hbase.apache.org/issue-tracking.html
7. http://hbase.apache.org/license.html
8. http://hbase.apache.org/mail-lists.html
9. https://hbase.apache.org/export_control.html