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HDFS-14667. Backport [HDFS-14403] "Cost-based FairCallQueue" to branch-2. Contributed by Erik Krogen

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    ./ipc/CostProvider.java
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    ./ipc/DecayRpcScheduler.java
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    ./ipc/DefaultCostProvider.java
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    ./ipc/WeightedTimeCostProvider.java
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HDFS-14667. Backport [HDFS-14403] "Cost-based FairCallQueue" to branch-2. Contributed by Erik Krogen

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    ./ipc/CostProvider.java
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    ./ipc/DecayRpcScheduler.java
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    ./ipc/DefaultCostProvider.java
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    ./ipc/WeightedTimeCostProvider.java
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HADOOP-16662. Remove unnecessary InnerNode check in NetworkTopology#add(). Contributed by Lisheng Sun.

HADOOP-16662. Remove unnecessary InnerNode check in NetworkTopology#add(). Contributed by Lisheng Sun.

HADOOP-16662. Remove unnecessary InnerNode check in NetworkTopology#add(). Contributed by Lisheng Sun.

HADOOP-16662. Remove unnecessary InnerNode check in NetworkTopology#add(). Contributed by Lisheng Sun.

HADOOP-16662. Remove unnecessary InnerNode check in NetworkTopology#add(). Contributed by Lisheng Sun.

HADOOP-16662. Remove unnecessary InnerNode check in NetworkTopology#add(). Contributed by Lisheng Sun.

HADOOP-16662. Remove unnecessary InnerNode check in NetworkTopology#add(). Contributed by Lisheng Sun.

HADOOP-16579. Upgrade to Curator 4.2.0 and ZooKeeper 3.5.5 (#1656). Contributed by Norbert Kalmár, Mate Szalay-Beko

* HADOOP-16579 - Upgrade to Apache Curator 4.2.0 and ZooKeeper 3.5.5

- Add a static initializer for the unit tests using ZooKeeper to enable

the four-letter-words diagnostic telnet commands. (this is an interface

that become disabled by default, so to keep the ZooKeeper 3.4.x behavior

we enabled it for the tests)

- Also fix ZKFailoverController to look for relevant fail-over ActiveAttempt

records. The new ZooKeeper seems to respond quicker during the fail-over

tests than the ZooKeeper, so we made sure to catch all the relevant records

by adding a new parameter to ZKFailoverontroller.waitForActiveAttempt().

Co-authored-by: Norbert Kalmár <nkalmar@cloudera.com>

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    ./util/curator/ZKCuratorManager.java
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HADOOP-16152. Upgrade Eclipse Jetty version to 9.4.x. Contributed by Yuming Wang, Siyao Meng.

Co-authored-By: Siyao Meng <smeng@cloudera.com>

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

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HADOOP-16580. Disable retry of FailoverOnNetworkExceptionRetry in case of AccessControlException. Contributed by Adam Antal

(cherry picked from commit c79a5f2d9930f58ad95864c59cd0a6164cd53280)

(cherry picked from commit 0bbd48c7a8c0d1dd57ffe5d372d749e5e7e41d34)

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HADOOP-16580. Disable retry of FailoverOnNetworkExceptionRetry in case of AccessControlException. Contributed by Adam Antal

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HADOOP-16580. Disable retry of FailoverOnNetworkExceptionRetry in case of AccessControlException. Contributed by Adam Antal

(cherry picked from commit c79a5f2d9930f58ad95864c59cd0a6164cd53280)

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HADOOP-15169. "hadoop.ssl.enabled.protocols" should be considered in httpserver2. Contributed by Brahma Reddy Battula, Wei-Chiu Chuang.

Reviewed-by: Xiaoyu Yao <xyao@apache.org>

Co-authored-By: Brahma Reddy Battula <brahma@apache.org>

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HDFS-14162. [SBN read] Allow Balancer to work with Observer node. Add a new ProxyCombiner allowing for multiple related protocols to be combined. Allow AlignmentContext to be passed in NameNodeProxyFactory. Contributed by Erik Krogen.

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    ./ipc/ProxyCombiner.java
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YARN-9760. Support configuring application priorities on a workflow level. Contributed by Varun Saxena

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YARN-9760. Support configuring application priorities on a workflow level. Contributed by Varun Saxena

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YARN-9760. Support configuring application priorities on a workflow level. Contributed by Varun Saxena

(cherry picked from commit eebd313d76ed742fe82292bd8c0184970cdc5692)

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YARN-9760. Support configuring application priorities on a workflow level. Contributed by Varun Saxena

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YARN-6715. Fix documentation about NodeHealthScriptRunner. Contributed by Peter Bacsko

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YARN-6715. Fix documentation about NodeHealthScriptRunner. Contributed by Peter Bacsko

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HADOOP-16458. LocatedFileStatusFetcher.getFileStatuses failing intermittently with S3

Contributed by Steve Loughran.

Includes

-S3A glob scans don't bother trying to resolve symlinks

-stack traces don't get lost in getFileStatuses() when exceptions are wrapped

-debug level logging of what is up in Globber

-Contains HADOOP-13373. Add S3A implementation of FSMainOperationsBaseTest.

-ITestRestrictedReadAccess tests incomplete read access to files.

This adds a builder API for constructing globbers which other stores can use

so that they too can skip symlink resolution when not needed.

Change-Id: I23bcdb2783d6bd77cf168fdc165b1b4b334d91c7

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HDFS-14564: Add libhdfs APIs for readFully; add readFully to ByteBufferPositionedReadable (#963) Contributed by Sahil Takiar.

Reviewed-by: Siyao Meng <smeng@cloudera.com>

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    ./fs/ByteBufferPositionedReadable.java
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HDFS-14874. Fix TestHDFSCLI and TestDFSShell test break because of logging change in mkdir (#1522). Contributed by Gabor Bota.

HADOOP-15691 Add PathCapabilities to FileSystem and FileContext.

Contributed by Steve Loughran.

This complements the StreamCapabilities Interface by allowing applications to probe for a specific path on a specific instance of a FileSystem client

to offer a specific capability.

This is intended to allow applications to determine

* Whether a method is implemented before calling it and dealing with UnsupportedOperationException.

* Whether a specific feature is believed to be available in the remote store.

As well as a common set of capabilities defined in CommonPathCapabilities,

file systems are free to add their own capabilities, prefixed with

fs. + schema + .

The plan is to identify and document more capabilities -and for file systems which add new features, for a declaration of the availability of the feature to always be available.

Note

* The remote store is not expected to be checked for the feature;

It is more a check of client API and the client's configuration/knowledge

of the state of the remote system.

* Permissions are not checked.

Change-Id: I80bfebe94f4a8bdad8f3ac055495735b824968f5

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    ./fs/CommonPathCapabilities.java
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    ./fs/PathCapabilities.java
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    ./fs/http/AbstractHttpFileSystem.java
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    ./fs/impl/FsLinkResolution.java
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    ./fs/impl/PathCapabilitiesSupport.java
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YARN-6715. Fix documentation about NodeHealthScriptRunner. Contributed by Peter Bacsko

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HADOOP-16138. hadoop fs mkdir / of nonexistent abfs container raises NPE (#1302). Contributed by Gabor Bota.

Change-Id: I2f637865c871e400b95fe7ddaa24bf99fa192023

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HDFS-14818. Check native pmdk lib by 'hadoop checknative' command. Contributed by Feilong He.

(cherry picked from commit 659c88801d008bb352d10a1cb3bd0e401486cc9b)

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HDFS-14818. Check native pmdk lib by 'hadoop checknative' command. Contributed by Feilong He.

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