f0a48dd89e
There is tiny time window when `LockRegistryLeaderInitiator` can be stopped during `Context.yield()` invocation.
In this case the `LockRegistryLeaderInitiator` goes to the stopped state, but a new `leaderSelector` is submitted for election.
Therefore in the `LockRegistryLeaderInitiatorTests.competing()` the second initiator may not get be granted because there is uncontrolled `leaderSelector` task on background.
We can overcome it with always `this.initiator.stop()` for the `LockRegistryLeaderInitiatorTests`, but to be sure in the fix it would be better to leave as is.
Also add `@Rule Log4jLevelAdjuster` for future diagnostics
**Cherry-pick to 4.3.x**
(cherry picked from commit 56929cd)
Spring Integration 
Checking out and Building
To check out the project and build from source, do the following:
git clone git://github.com/spring-projects/spring-integration.git
cd spring-integration
./gradlew build
NOTE: While Spring Integration runs with Java SE 6 or higher, a Java 8 compiler is required to build the project.
If you encounter out of memory errors during the build, increase available heap and permgen for Gradle:
GRADLE_OPTS='-XX:MaxPermSize=1024m -Xmx1024m'
To build and install jars into your local Maven cache:
./gradlew install
To build api Javadoc (results will be in build/api):
./gradlew api
To build reference documentation (results will be in build/reference):
./gradlew reference
To build complete distribution including -dist, -docs, and -schema zip files (results will be in build/distributions)
./gradlew dist
Using Eclipse
To generate Eclipse metadata (.classpath and .project files), do the following:
./gradlew eclipse
Once complete, you may then import the projects into Eclipse as usual:
File -> Import -> Existing projects into workspace
Browse to the 'spring-integration' root directory. All projects should import free of errors.
Using IntelliJ IDEA
To generate IDEA metadata (.iml and .ipr files), do the following:
./gradlew idea
Resources
For more information, please visit the Spring Integration website at: http://projects.spring.io/spring-integration