Comments inline
> ---------- Forwarded message ----------
> From: Zheyuan Chen <zchen137@xxxxxxxx>
> Date: Sat, Jun 3, 2017 at 1:45 PM
> Subject: Bug report: unexpected behavior when executing
> Lua object class
> To: ceph-users@xxxxxxxxxxxxxx
>
> Bug 1: I can not get returned output in the first script. "data" is
> always empty.
>
>> import rados, json
>> cluster = rados.Rados(conffile='')
>> cluster.connect()
>> ioctx = cluster.open_ioctx('data')
>> cmd = {
>> "script": """
>> function test(input, output)
>> data = bufferlist.new()
>> data:append("test")
>> objclass.write_full(data, #data)
>> output:append("Here is the return value")
>> end
>> objclass.register(test)
>> """,
>> "handler": "test",
>> "input": "",
>> }
>> # I can not get returned data
>> ret, data = ioctx.execute('test', 'lua', 'eval_json', json.dumps(cmd))
>> print ret, data
Unfortunately, this isn't a bug. Rados clears any returned data from
an object class method if the operation also writes to the object.
> Bug 2:
> The returned mtime is always 0.
This might be a bug, but there are a few things to rule out. Did you
write to the object before running stat? There is also a test case
here: can you try to run them?
https://github.com/ceph/ceph/blob/master/src/test/cls_lua/test_cls_lua.cc#L679
- Noah
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