ad08d9add0
JIRA: https://jira.spring.io/browse/INT-4175 Fixes GH-1980 (https://github.com/spring-projects/spring-integration/issues/1980) When the `isSharedSession` is used for the `DefaultSftpSessionFactory`, there is some race condition window when we can call the target `this.jschSession.connect()` several times and end up with the session is already connected. Wrap `sftpSession.connect()` to the `this.sharedSessionLock.readLock().lock()` when `isSharedSession` to protect from that race condition. Note: there is no test for this change because it is pretty tricky to build barriers between threads for this kind of race conditions. Especially after introduction `this.sharedSessionLock.readLock().lock()` around guilty code **Cherry-pick to 4.3.x & 4.2.x** Move `sharedJschSession` connect logic to the existing locking block Fix mock test to reflect the current ConnectionFactory state Conflicts: spring-integration-sftp/src/test/java/org/springframework/integration/sftp/outbound/SftpOutboundTests.java Resolved.
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
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./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