Torquebox 2.0.0 error while deploying application

server.log

09:54:38,555 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-13) JBAS015876: Starting deployment of "search_api-knob.yml"
09:54:38,555 INFO  [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015863: Replacement of deployment "search_api-knob.yml" by deployment "search_api-knob.yml" was rolled back with failure mes
sage {"JBAS014671: Failed services" => {"jboss.deployment.unit.\"search_api-knob.yml\".STRUCTURE" => "org.jboss.msc.service.StartException in service jboss.deployment.unit.\"search_api-knob.yml\".STRUC
TURE: Failed to process phase STRUCTURE of deployment \"search_api-knob.yml\""}}
09:54:38,557 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-20) MSC00001: Failed to start service jboss.deployment.unit."search_api-knob.yml".STRUCTURE: org.jboss.msc.service.StartException i
n service jboss.deployment.unit."search_api-knob.yml".STRUCTURE: Failed to process phase STRUCTURE of deployment "search_api-knob.yml"
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:119) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_26]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_26]
        at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_26]
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: java.io.IOException: Filesystem already mounted at mount point ""/opt/torquebox/jboss/standalone/deployments/search_api-knob
.yml/search_api-knob.yml""
        at org.torquebox.core.processors.KnobRootMountProcessor.deploy(KnobRootMountProcessor.java:71)
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
        ... 5 more
Caused by: java.io.IOException: Filesystem already mounted at mount point ""/opt/torquebox/jboss/standalone/deployments/search_api-knob.yml/search_api-knob.yml""
        at org.jboss.vfs.VFS.mount(VFS.java:132) [jboss-vfs-3.1.0.Final.jar:3.1.0.Final]
        at org.jboss.vfs.VFS.doMount(VFS.java:354) [jboss-vfs-3.1.0.Final.jar:3.1.0.Final]
        at org.jboss.vfs.VFS.mountReal(VFS.java:449) [jboss-vfs-3.1.0.Final.jar:3.1.0.Final]
        at org.torquebox.core.processors.KnobRootMountProcessor.deploy(KnobRootMountProcessor.java:65)
        ... 6 more

09:54:38,563 INFO  [org.jboss.as.controller] (DeploymentScanner-threads - 2) JBAS014774: Service status report
JBAS014777:   Services which failed to start:      service jboss.deployment.unit."search_api-knob.yml".STRUCTURE: org.jboss.msc.service.StartException in service jboss.deployment.unit."search_api-knob.yml".STRUCTURE: Failed to process phase STRUCTURE of deployment "search_api-knob.yml"

09:54:41,844 WARN  [org.jboss.vfs] (Finalizer) A VFS mount ("/opt/torquebox/jboss/standalone/deployments/search_api-knob.yml/search_api-knob.yml") was leaked!: Allocation stack trace:
        at java.lang.Thread.getStackTrace(Thread.java:1479) [rt.jar:1.6.0_26]
        at org.jboss.vfs.VFS$Mount.<init>(VFS.java:629)
        at org.jboss.vfs.VFS.mount(VFS.java:119)
        at org.jboss.vfs.VFS.doMount(VFS.java:354)
        at org.jboss.vfs.VFS.mountReal(VFS.java:449)
        at org.torquebox.core.processors.KnobRootMountProcessor.deploy(KnobRootMountProcessor.java:65)
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113)
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_26]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_26]
        at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_26]