Hi List,
Seems like GWT can't handle Arrays.asList not very well. Sharing this
in case others have similar issues:
I was working on a very strange deserialization bug in combination
with GWT [1]. We had a deserialization problem after loading a VM and
trying to send the VM back to the backend.
The error looked like this:
2016-06-28 12:17:36,206 ERROR [io.undertow.servlet] (default
task-58) Exception while dispatching incoming RPC call:
java.lang.NumberFormatException: For input string: "undefined"
It turned out that GWT could serialize an ArrayList backed by an
Integer[] array but it could not deserialize it afterwards.
In my case a list returned by ResultSet#getArray in the DAO layer was
sent to GWT:
entity.setCpuIds(Arrays.asList((Integer[])
rs.getArray("cpu_core_ids").getArray()));
After copying the content over into a regular ArrayList everything
worked fine again.
entity.setCpuIds(new ArrayList<Integer>(Arrays.asList((Integer[])
rs.getArray("cpu_core_ids").getArray())))
Here is also the gerrit patch set [2].
So if you see strange GWT RPC errors like the one above look out for
"Arrays.asList" in you code :).
Best Regards,
Roman
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1350861
[2] https://gerrit.ovirt.org/#/c/61038/2
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