Using BRMS 6 cluster with Helix and Zookeeper it throws "git://0.0.0.0:9418/system: Connection refused" ERROR

Issue

• While using Helix and Zookeeper with BRMS 6.1.0 the following ERROR message is seen in the server log during server start-up. What could be the root cause behind this issue?

...
INFO  [org.apache.helix.messaging.handling.HelixTask] (pool-11-thread-2) handling task: 4f74509f-c0db-4763-922d-c11cd887fee0 begin, at: 1438972303420
ERROR [org.uberfire.io.impl.AbstractIOService] (pool-11-thread-2) Failed to register filesystem default://system?sync=git%3A%2F%2F0.0.0.0%3A9418%2Fsystem&force with DEFAULT_FS_TYPE. Returning null.: org.uberfire.java.nio.IOException: java.lang.RuntimeException: org.eclipse.jgit.api.errors.TransportException: git://0.0.0.0:9418/system: Connection refused
    at org.uberfire.java.nio.fs.jgit.JGitFileSystemProvider.getFileSystem(JGitFileSystemProvider.java:656) [uberfire-nio2-jgit-0.5.4.Final-redhat-2.jar:0.5.4.Final-redhat-2]
    at org.uberfire.java.nio.file.FileSystems.getFileSystem(FileSystems.java:66) [uberfire-nio2-api-0.5.4.Final-redhat-2.jar:0.5.4.Final-redhat-2]
    at org.uberfire.io.impl.AbstractIOService.getFileSystem(AbstractIOService.java:214) [uberfire-io-0.5.4.Final-redhat-2.jar:0.5.4.Final-redhat-2]
    at org.uberfire.io.impl.cluster.IOServiceClusterImpl$SyncFileSystemMessageHandler.handleMessage(IOServiceClusterImpl.java:1027) [uberfire-io-0.5.4.Final-redhat-2.jar:0.5.4.Final-redhat-2]
    at org.uberfire.io.impl.cluster.helix.ClusterServiceHelix$MessageHandlerResolverWrapper$1$1.handleMessage(ClusterServiceHelix.java:306) [uberfire-io-0.5.4.Final-redhat-2.jar:0.5.4.Final-redhat-2]
    at org.apache.helix.messaging.handling.HelixTask.call(HelixTask.java:93) [helix-core-0.6.2-incubating.jar:0.6.2-incubating]
    at org.apache.helix.messaging.handling.HelixTask.call(HelixTask.java:50) [helix-core-0.6.2-incubating.jar:0.6.2-incubating]
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) [rt.jar:1.7.0_51]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_51]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_51]
    at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_51]
Caused by: java.lang.RuntimeException: org.eclipse.jgit.api.errors.TransportException: git://0.0.0.0:9418/system: Connection refused
    at org.uberfire.java.nio.fs.jgit.util.JGitUtil.syncRepository(JGitUtil.java:318) [uberfire-nio2-jgit-0.5.4.Final-redhat-2.jar:0.5.4.Final-redhat-2]
    at org.uberfire.java.nio.fs.jgit.JGitFileSystemProvider.getFileSystem(JGitFileSystemProvider.java:652) [uberfire-nio2-jgit-0.5.4.Final-redhat-2.jar:0.5.4.Final-redhat-2]
    ... 10 more
Caused by: org.eclipse.jgit.api.errors.TransportException: git://0.0.0.0:9418/system: Connection refused
    at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:139) [org.eclipse.jgit-3.3.2.201404171909-r.jar:3.3.2.201404171909-r]
    at org.uberfire.java.nio.fs.jgit.util.JGitUtil.syncRepository(JGitUtil.java:273) [uberfire-nio2-jgit-0.5.4.Final-redhat-2.jar:0.5.4.Final-redhat-2]
    ... 11 more
Caused by: org.eclipse.jgit.errors.TransportException: git://0.0.0.0:9418/system: Connection refused
    at org.eclipse.jgit.transport.TransportGitAnon.openConnection(TransportGitAnon.java:141) [org.eclipse.jgit-3.3.2.201404171909-r.jar:3.3.2.201404171909-r]
    at org.eclipse.jgit.transport.TransportGitAnon$TcpFetchConnection.<init>(TransportGitAnon.java:170) [org.eclipse.jgit-3.3.2.201404171909-r.jar:3.3.2.201404171909-r]
    at org.eclipse.jgit.transport.TransportGitAnon.openFetch(TransportGitAnon.java:111) [org.eclipse.jgit-3.3.2.201404171909-r.jar:3.3.2.201404171909-r]
    at org.eclipse.jgit.transport.FetchProcess.executeImp(FetchProcess.java:136) [org.eclipse.jgit-3.3.2.201404171909-r.jar:3.3.2.201404171909-r]
    at org.eclipse.jgit.transport.FetchProcess.execute(FetchProcess.java:122) [org.eclipse.jgit-3.3.2.201404171909-r.jar:3.3.2.201404171909-r]
    at org.eclipse.jgit.transport.Transport.fetch(Transport.java:1111) [org.eclipse.jgit-3.3.2.201404171909-r.jar:3.3.2.201404171909-r]
    at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:130) [org.eclipse.jgit-3.3.2.201404171909-r.jar:3.3.2.201404171909-r]
    ... 12 more

INFO  [org.apache.helix.messaging.handling.HelixTask] (pool-11-thread-2) Message 4f74509f-c0db-4763-922d-c11cd887fee0 completed.
INFO  [org.apache.helix.messaging.handling.HelixTaskExecutor] (pool-11-thread-2) message finished: 4f74509f-c0db-4763-922d-c11cd887fee0, took 20
...