Watch of ImageStreamTags is unsupported by the server and causes:

{{
[DEBUG] 2016-02-09 10:39:33,901 com.openshift.internal.restclient.WatchClient - WatchSocket Error
org.eclipse.jetty.websocket.api.UpgradeException: Didn't switch protocols
at org.eclipse.jetty.websocket.client.io.UpgradeConnection.validateResponse(UpgradeConnection.java:314)
at org.eclipse.jetty.websocket.client.io.UpgradeConnection.read(UpgradeConnection.java:241)
at org.eclipse.jetty.websocket.client.io.UpgradeConnection.onFillable(UpgradeConnection.java:163)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Thread.java:745)
[DEBUG] 2016-02-09 10:39:33,902 com.openshift.internal.restclient.WatchClient - WatchSocket Error
org.eclipse.jetty.websocket.api.UpgradeException: Didn't switch protocols
at org.eclipse.jetty.websocket.client.io.UpgradeConnection.validateResponse(UpgradeConnection.java:314)
at org.eclipse.jetty.websocket.client.io.UpgradeConnection.read(UpgradeConnection.java:241)
at org.eclipse.jetty.websocket.client.io.UpgradeConnection.onFillable(UpgradeConnection.java:163)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Thread.java:745)
}}