Fixes read-ahead buffer management issues introduced by HADOOP-16852,
"ABFS: Send error back to client for Read Ahead request failure".
Contributed by Sneha Vijayarajan
Contributed by Sneha Vijayarajan
DETAILS:
This change adds config key "fs.azure.enable.conditional.create.overwrite" with
a default of true. When enabled, if create(path, overwrite: true) is invoked
and the file exists, the ABFS driver will first obtain its etag and then attempt
to overwrite the file on the condition that the etag matches. The purpose of this
is to mitigate the non-idempotency of this method. Specifically, in the event of
a network error or similar, the client will retry and this can result in the file
being created more than once which may result in data loss. In essense this is
like a poor man's file handle, and will be addressed more thoroughly in the future
when support for lease is added to ABFS.
TEST RESULTS:
namespace.enabled=true
auth.type=SharedKey
-------------------
$mvn -T 1C -Dparallel-tests=abfs -Dscale -DtestsThreadCount=8 clean verify
Tests run: 87, Failures: 0, Errors: 0, Skipped: 0
Tests run: 457, Failures: 0, Errors: 0, Skipped: 42
Tests run: 207, Failures: 0, Errors: 0, Skipped: 24
namespace.enabled=true
auth.type=OAuth
-------------------
$mvn -T 1C -Dparallel-tests=abfs -Dscale -DtestsThreadCount=8 clean verify
Tests run: 87, Failures: 0, Errors: 0, Skipped: 0
Tests run: 457, Failures: 0, Errors: 0, Skipped: 74
Tests run: 207, Failures: 0, Errors: 0, Skipped: 140
Adds the options to control the size of the per-output-stream threadpool
when writing data through the abfs connector
* fs.azure.write.max.concurrent.requests
* fs.azure.write.max.requests.to.queue
Contributed by Bilahari T H
Fixes the regression caused by HADOOP-17281, where the WebHDFS client
listStatusIterator (correctly) throws NoSuchElementException when next()
runs out of values.
Contributed by Mukund Thakur.
Change-Id: I6cec41c20467920cf21f169653553535414b2680
* update org.apache.httpcomponents:httpclient from 4.5.6 to 4.5.13
* update org.apache.httpcomponents:httpcore from 4.4.10 to 4.4.13
(cherry picked from commit be3edd0532)
This reverts changes in HADOOP-13230 to use S3Guard TTL in choosing when
to issue a HEAD request; fixing tests to compensate.
New org.apache.hadoop.fs.s3a.performance.OperationCost cost,
S3GUARD_NONAUTH_FILE_STATUS_PROBE for use in cost tests.
Contributed by Steve Loughran.
Change-Id: I418d55d2d2562a48b2a14ec7dee369db49b4e29e
This switches the SnappyCodec to use the java-snappy codec, rather than the native one.
To use the codec, snappy-java.jar (from org.xerial.snappy) needs to be on the classpath.
This comesin as an avro dependency, so it is already on the hadoop-common classpath,
as well as in hadoop-common/lib.
The version used is now managed in the hadoop-project POM; initially 1.1.7.7
Contributed by DB Tsai and Liang-Chi Hsieh
Change-Id: Id52a404a0005480e68917cd17f0a27b7744aea4e
When a filesystem is closed, the FileSystem log will, at debug level,
log the method calling close/closeAll.
At trace level: the full calling stack.
Contributed by Karen Coppage.
Change-Id: I1444f065c171fd31d42b497c92ba4517969f67f0
S3AFileSystem.listStatus() is optimized for invocations
where the path supplied is a non-empty directory.
The number of S3 requests is significantly reduced, saving
time, money, and reducing the risk of S3 throttling.
Contributed by Mukund Thakur.
Change-Id: I7cc5f87aa16a4819e245e0fbd2aad226bd500f3f
