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https://issues.apache.org/jira/browse/YARN-9783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Szalay-Beko Mate updated YARN-9783:
-----------------------------------
Description:
ZooKeeper 3.5.5 release is the latest stable one. It contains many new features
(including SSL related improvements which are very important for production
use; see [the release
notes|https://zookeeper.apache.org/doc/r3.5.5/releasenotes.html]). Yet there
should be no backward incompatible changes on the API, so the applications
using ZooKeeper clients should be built against the new zookeeper without any
problem and the new ZooKeeper client should work with the older (3.4) servers
without any issue, at least until someone is start to use new functionality.
The aim of this ticket is not to change the ZooKeeper version used by Hadoop
YARN yet, but to enable people to rebuild and test Hadoop with the new
ZooKeeper version.
Currently the Hadoop build (with ZooKeeper 3.5.5) fails because of a YARN test
case:
[TestSecureRegistry.testLowlevelZKSaslLogin()|https://github.com/apache/hadoop/blob/a0da1ec01051108b77f86799dd5e97563b2a3962/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/secure/TestSecureRegistry.java#L64].
This test case seems to use low-level ZooKeeper internal code, which changed
in the new ZooKeeper version. Although I am not sure what was the original
reasoning of the inclusion of this test in the YARN code, I propose to remove
it, and if there is still any missing test case in ZooKeeper, then let's issue
a ZooKeeper ticket to test this scenario there.
was:
ZooKeeper 3.5.5 release is the latest stable one. It contains many new features
(including SSL related improvements which are very important for production
use; see [the release
notes|https://zookeeper.apache.org/doc/r3.5.5/releasenotes.html]). Yet there
should be no backward incompatible changes on the API, so the applications
using ZooKeeper clients should be built against the new zookeeper without any
problem and the new ZooKeeper client should work with the older (3.4) servers
without any issue, at least until someone is start to use new functionality.
The aim of this ticket is not to change the ZooKeeper version used by Hadoop
YARN yet, but to enable people to rebuild and test Hadoop with the new
ZooKeeper version.
Currently the Hadoop build (with ZooKeeper 3.5.5) fails because of a YARN test
case: `TestSecureRegistry.testLowlevelZKSaslLogin()`. This test case seems to
use low-level ZooKeeper internal code, which changed in the new ZooKeeper
version. Although I am not sure what was the original reasoning of the
inclusion of this test in the YARN code, I propose to remove it, and if there
is still any missing test case in ZooKeeper, then let's issue a ZooKeeper
ticket to test this scenario there.
> Remove low-level zookeeper test to be able to build Hadoop against zookeeper
> 3.5.5
> ----------------------------------------------------------------------------------
>
> Key: YARN-9783
> URL: https://issues.apache.org/jira/browse/YARN-9783
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Szalay-Beko Mate
> Priority: Major
>
> ZooKeeper 3.5.5 release is the latest stable one. It contains many new
> features (including SSL related improvements which are very important for
> production use; see [the release
> notes|https://zookeeper.apache.org/doc/r3.5.5/releasenotes.html]). Yet there
> should be no backward incompatible changes on the API, so the applications
> using ZooKeeper clients should be built against the new zookeeper without any
> problem and the new ZooKeeper client should work with the older (3.4) servers
> without any issue, at least until someone is start to use new functionality.
> The aim of this ticket is not to change the ZooKeeper version used by Hadoop
> YARN yet, but to enable people to rebuild and test Hadoop with the new
> ZooKeeper version.
> Currently the Hadoop build (with ZooKeeper 3.5.5) fails because of a YARN
> test case:
> [TestSecureRegistry.testLowlevelZKSaslLogin()|https://github.com/apache/hadoop/blob/a0da1ec01051108b77f86799dd5e97563b2a3962/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/secure/TestSecureRegistry.java#L64].
> This test case seems to use low-level ZooKeeper internal code, which changed
> in the new ZooKeeper version. Although I am not sure what was the original
> reasoning of the inclusion of this test in the YARN code, I propose to remove
> it, and if there is still any missing test case in ZooKeeper, then let's
> issue a ZooKeeper ticket to test this scenario there.
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