I didn't look properly, it's the same error with the patch applied.
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https://bugs.launchpad.net/bugs/1585533
Title:
cache-miss-rate / Invalid JSON
Status in QEMU:
New
Bug description:
Hi,
We have VMs which were started with an older version than qemu 2.1
which added "cache-miss-rate" property for XBZRLECacheStats. While
trying to migrate the VM to a new host which is running a higher
version (2.3) of Qemu we got an exception:
virJSONValueFromString:1642 : internal error: cannot parse json {"return":
{"expected-downtime": 1, "xbzrle-cache": {"bytes": 0, "cache-size": 67108864,
"cache-miss-rate": -nan, "pages": 0, "overflow": 0, "cache-miss": 8933},
"status": "active", "disk": {"total": 429496729600, "dirty-sync-count": 0,
"remaining": 193896382464, "mbps": 0, "transferred": 235600347136, "duplicate":
0, "dirty-pages-rate": 0, "skipped": 0, "normal-bytes": 0, "normal": 0},
"setup-time": 13, "total-time": 1543124, "ram": {"total": 8599183360,
"dirty-sync-count": 4, "remaining": 30695424, "mbps": 830.636997,
"transferred": 3100448901, "duplicate": 1358341, "dirty-pages-rate": 7,
"skipped": 0, "normal-bytes": 3082199040, "normal": 752490}}, "id":
"libvirt-186200"}: lexical error: malformed number, a digit is required after
the minus sign.
67108864, "cache-miss-rate": -nan, "pages": 0, "overflow": 0
(right here) ------^
virNetClientStreamRaiseError:191 : stream aborted at client request
Would it be possible to improve the JSON parser to skip the key if the value
is incorrect instead of throwing an exception? Then hopefully qemu 2.3 or
higher is able to handle the data without this property, falling back to its
default.
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