Dear community,

===============
FLINK 1.1.0 RC0
===============

I've now created a "preview RC" for the upcoming 1.1.0 release,
including everything in master up to cb7824
(https://github.com/uce/flink/tree/release-1.1.0-rc0).

There are still some blocking issues and important pull requests to be
merged (see below), but nevertheless I would like to start testing
Flink for the release in order to get the process going.

In past major releases, we needed to create many release candidates,
often for fixing just some small issues. I would like to speed up the
release process by collecting the last remaining issues with the RC0.
Once these issues are resolved, we can start voting on RC1. This is
also when I will create the release-1.1 branch.

We have a Wiki page
https://cwiki.apache.org/confluence/display/FLINK/Releasing containing
some common release verification tasks.

Also, production users are encouraged to participate in the release
verification process.

Here are the preview binaries located:
http://home.apache.org/~uce/flink-1.1.0-rc0/

This is the staging repository:
https://repository.apache.org/content/repositories/orgapacheflink-1097

To use the release candidate in an existing Maven project, set the
Flink version to 1.1.0 and the repository URL to
https://repository.apache.org/content/repositories/orgapacheflink-1097.

The POM should look like this:

<properties>
   <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   <flink.version>1.1.0</flink.version>
</properties>

<repositories>
   <repository>
      <id>flink.release-staging</id>
      <name>Apache Development Snapshot Repository</name>
      
<url>https://repository.apache.org/content/repositories/orgapacheflink-1097</url>
      <releases><enabled>true</enabled></releases>
      <snapshots><enabled>false</enabled></snapshots>
   </repository>
</repositories>

===========
OPEN ISSUES
===========

The following are important to be fixed/merged before the release:
- Savepoint headers: PR #2083 (https://github.com/apache/flink/pull/2083)
  * includes FLINK-4154 (https://issues.apache.org/jira/browse/FLINK-4154)
- Savepoint disposal with user class loader: #2194
(https://github.com/apache/flink/pull/2194)
- Cassandra sink exception check: #2183
(https://github.com/apache/flink/pull/2183)
- Prevent Metrics log flooding: #2135
(https://github.com/apache/flink/pull/2135)
- CEP serialization: #2202 (https://github.com/apache/flink/pull/2202)
- HA BLOB store life-cycle: https://issues.apache.org/jira/browse/FLINK-4150

Nice to have:
- Hash-based combine: #1517 https://github.com/apache/flink/pull/1517

Feel free to add issues/PRs to the list and please report any issues
you encounter during testing in this thread.

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