Password check failed

[dominikl]

Sometimes you can get a Password check failed ... error whilst already connected to an server. I've not been able to reproduce it, but here's a QA stacktrace from Insight:

java.lang.Exception: omero.gateway.exception.DSAccessException: Cannot access data. 
Cannot retrieve the pixels set for 37172
	at org.openmicroscopy.shoola.env.data.OMEROGateway.handleException(OMEROGateway.java:773)
	at org.openmicroscopy.shoola.env.data.OMEROGateway.getPixels(OMEROGateway.java:2196)
	at org.openmicroscopy.shoola.env.data.OmeroMetadataServiceImpl.getChannelsMetadata(OmeroMetadataServiceImpl.java:2479)
	at org.openmicroscopy.shoola.env.data.views.calls.ChannelMetadataLoader$1.doCall(ChannelMetadataLoader.java:76)
	at org.openmicroscopy.shoola.env.data.views.BatchCall.doStep(BatchCall.java:144)
	at org.openmicroscopy.shoola.util.concur.tasks.CompositeTask.doStep(CompositeTask.java:226)
	at org.openmicroscopy.shoola.env.data.views.CompositeBatchCall.doStep(CompositeBatchCall.java:126)
	at org.openmicroscopy.shoola.util.concur.tasks.ExecCommand.exec(ExecCommand.java:165)
	at org.openmicroscopy.shoola.util.concur.tasks.ExecCommand.run(ExecCommand.java:276)
	at org.openmicroscopy.shoola.util.concur.tasks.AsyncProcessor$Runner.run(AsyncProcessor.java:91)
	at java.lang.Thread.run(Thread.java:748)
Caused by: omero.gateway.exception.DSOutOfServiceException: Failed to create connector
	at omero.gateway.Gateway.createConnector(Gateway.java:1665)
	at omero.gateway.Gateway.getConnector(Gateway.java:1535)
	at omero.gateway.Gateway.getPixelsService(Gateway.java:851)
	at org.openmicroscopy.shoola.env.data.OMEROGateway.getPixels(OMEROGateway.java:2193)
	... 9 more
Caused by: Glacier2.PermissionDeniedException
    reason = "Password check failed for 'user123': [id=307]"
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
...

How is this possible?