The gradle build is stuck

• use the -debug option for more detailed information, this may help diagnosing the issue
• if you are behind a proxy, you may have to set gradle environment variable: 

  GRADLE_OPTS="-Dhttp.proxyHost=your proxy server -Dhttp.proxyPort= your proxy port number"

Some messages can't reach some of the S4 nodes

You may have some connectivity issues.

• make sure Zookeeper ensemble is reachable from all the nodes of your s4 clusters
• use the s4 status -zk=<zkString> tool. This will show the current status of the s4 clusters on the given ZooKeeper ensemble, including:
  • which clusters are available
  • which nodes are available on each cluster
  • what the addresses of the nodes are (hostname/ip and port)
  • which application is deployed on a given cluster, and where the code is fetched from
  • which external streams are linking cluster applications, along with their consumer and receiver apps and clusters
• make sure available nodes are actually reachable, based on the socket info from the status command (host/port) and using standard tools such as telnet and netcat

I get some "Could not resolve all dependencies for configuration .... " error when building the project from source

This is a known issue with Gradle, see GRADLE-2369 and GRADLE-2034 for an explanation. It happens when an artifact exists in your local maven repository but it's missing the jar files.

There are two ways of solving it:

1. Comment the "mavenLocal()" line in build.gradle (or place it after mavenCentral() )
2. Cleaning or at least removing the problematic dependency from your repository. The local maven repository is usually in the ~/.m2 directory