Re: [libvirt] error: server response too large

> I've also tested your patch, and it seems 256 KB of data is still a > bit too large: > > virsh # screenshot 2 /tmp/test > error: could not receive data from domain 2 > error: packet 262168 bytes received from server too large, want 262144 > > The max payload size is computed as: > > VIR_NET_MESSAGE_MAX = 16777216 > VIR_NET_MESSAGE_HEADER_MAX = 24 > VIR_NET_MESSAGE_PAYLOAD_MAX = (VIR_NET_MESSAGE_MAX - VIR_NET_MESSAGE_HEADER_MAX) = 16777192 > > So, it seems the legacy max payload size is actually 262120; I tested > it and it works. > > ------------------- 8< ------ >8 --------------------------- > Subject: [PATCH] Adjust legacy max payload size to account for header > information > Organization: AV-Test GmbH, Germany > > Commit 27e81517a87 set the payload size to 256 KB, which is > actually the max packet size, including the size of the header. > > Reduce this by VIR_NET_MESSAGE_HEADER_MAX (24) and set > VIR_NET_MESSAGE_LEGACY_PAYLOAD_MAX to 262120. > > Signed-off-by: Claudio Bley <cbley(a)av-test.de&gt; > --- > src/rpc/virnetprotocol.x | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/src/rpc/virnetprotocol.x b/src/rpc/virnetprotocol.x > index 1eae7cb..7b6f753 100644 > --- a/src/rpc/virnetprotocol.x > +++ b/src/rpc/virnetprotocol.x > @@ -55,7 +55,7 @@ const VIR_NET_MESSAGE_INITIAL = 65536; > * payload size. We need to remember this for compat with > * old clients. > */ > -const VIR_NET_MESSAGE_LEGACY_PAYLOAD_MAX = 262144; > +const VIR_NET_MESSAGE_LEGACY_PAYLOAD_MAX = 262120; > > /* Maximum total message size (serialised). */ > const VIR_NET_MESSAGE_MAX = 16777216; Damn, yes, you are correct. The original value was 262120, I copied the wrong value. THe commit which changed it first was commit eb635de1fed3257c5c62b552d1ec981c9545c1d7 Author: Michal Privoznik <mprivozn(a)redhat.com&gt; Date: Fri Apr 27 14:49:48 2012 +0200 rpc: Size up RPC limits /* Size of message payload */ -const VIR_NET_MESSAGE_PAYLOAD_MAX = 262120; +const VIR_NET_MESSAGE_PAYLOAD_MAX = 4194280;