Error when discovering Isilon (ports)

I'm getting the following error

Device discovery failed; Device is unreachable

when discovering an OneFS 7.1 Isilon

Here is the log :

discoverPorts failed. Storage system: urn:storageos:StorageSystem:a3b40471-fbc2-4b89-8761-6fb358489284:

com.emc.storageos.isilon.restapi.IsilonException: Get storage connection info failed on Isilon array, http status Client response status: 200

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)

at java.lang.reflect.Constructor.newInstance(Constructor.java:513)

at com.emc.storageos.svcs.errorhandling.model.ExceptionMessagesProxy.contructException(ExceptionMessagesProxy.java:177)

at com.emc.storageos.svcs.errorhandling.model.ExceptionMessagesProxy.invoke(ExceptionMessagesProxy.java:66)

at com.sun.proxy.$Proxy46.getStorageConnectionInfoFailedOnIsilonArrayExc(Unknown Source)

at com.emc.storageos.isilon.restapi.IsilonApi.getSmartConnectInfo(IsilonApi.java:886)

at com.emc.storageos.volumecontroller.impl.plugins.IsilonCommunicationInterface.discoverPorts(IsilonCommunicationInterface.java:457)

at com.emc.storageos.volumecontroller.impl.plugins.IsilonCommunicationInterface.discoverAll(IsilonCommunicationInterface.java:274)

at com.emc.storageos.volumecontroller.impl.plugins.IsilonCommunicationInterface.discover(IsilonCommunicationInterface.java:235)

at com.emc.storageos.volumecontroller.impl.plugins.discovery.smis.DataCollectionJobInvoker.invoke(DataCollectionJobInvoker.java:132)

at com.emc.storageos.volumecontroller.impl.plugins.discovery.smis.DataCollectionJobInvoker.process(DataCollectionJobInvoker.java:86)

at com.emc.storageos.volumecontroller.impl.plugins.discovery.smis.DataCollectionJobConsumer.invokeJob(DataCollectionJobConsumer.java:279)

at com.emc.storageos.volumecontroller.impl.plugins.discovery.smis.DataCollectionJobConsumer$1.run(DataCollectionJobConsumer.java:205)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)

at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)

at java.util.concurrent.FutureTask.run(FutureTask.java:138)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)

at java.lang.Thread.run(Thread.java:662)

Caused by: javax.ws.rs.WebApplicationException: java.lang.Exception: Error parsing JSON object.

at com.sun.jersey.json.impl.provider.entity.JSONObjectProvider.readFrom(JSONObjectProvider.java:93)

at com.sun.jersey.json.impl.provider.entity.JSONObjectProvider$App.readFrom(JSONObjectProvider.java:65)

at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:554)

at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:506)

at com.emc.storageos.isilon.restapi.IsilonApi.getSmartConnectInfo(IsilonApi.java:879)

... 15 more

Caused by: java.lang.Exception: Error parsing JSON object.

... 20 more

Caused by: org.codehaus.jettison.json.JSONException: A JSONObject text must begin with '{' at character 2 of

[

{

"service_ip" : "10.250.14.239",

"zones" : [ "NY-NAS-P-SHARE-001" ]

},

{

"service_ip" : "10.250.16.239",

"zones" : [ "NY-NAS-I-SHARE-001", "NY-NAS-I-NFS-001" ]

},

{

"service_ip" : "157.150.187.239",

"zones" : [ "NY-NAS-E-SHARE-001" ]

},

{

"service_ip" : "10.250.25.239",

"zones" : [ "NY-NAS-P-MGT-011", "Backup" ]

}

]

at org.codehaus.jettison.json.JSONTokener.syntaxError(JSONTokener.java:439)

at org.codehaus.jettison.json.JSONObject. (JSONObject.java:169)

at org.codehaus.jettison.json.JSONObject. (JSONObject.java:266)

at com.sun.jersey.json.impl.provider.entity.JSONObjectProvider.readFrom(JSONObjectProvider.java:91)

... 19 more