There is a maximum length for message buffers that was introduced by HADOOP-9676. So messages with length 1752330339 should not be accepted.
best, Colin On Sat, Dec 28, 2013 at 11:06 AM, Dhaivat Pandya <dhaivatpan...@gmail.com> wrote: > Hi, > > I've been working a lot with the Hadoop NameNode IPC protocol (while > building a cache layer on top of Hadoop). I've noticed that for request > packets coming from the default DFS client that do not have a method name, > the length field is often *completely *off. > > For example, I've been looking at packets with length 1752330339. I thought > this might have been an issue with my cache layer, so I checked with > Wireshark, and found packets with such absurd length parameters (obviously, > the packets themselves weren't actually that long; the length field was > misrepresented). > > Unfortunately, I haven't had the opportunity to test this issue on other > machines and setups (the reproducing steps should be running an "ls /" with > the default DFS client and sniffing the packets to find the length > parameter, release 1.2.1). > > Is this normal behavior, a bug or something I'm missing? > > Thank you, > > Dhaivat
