This shouldn't be happening at all... What version of hadoop are you running? Potentially you need configs to protect the JT that you are missing, those should ensure your hadoop-1.x JT is very reliable.
Arun On Jun 8, 2012, at 8:26 AM, David Rosenstrauch wrote: > Our job tracker has been seizing up with Out of Memory (heap space) errors > for the past 2 nights. After the first night's crash, I doubled the heap > space (from the default of 1GB) to 2GB before restarting the job. After last > night's crash I doubled it again to 4GB. > > This all seems a bit puzzling to me. I wouldn't have thought that the job > tracker should require so much memory. (The NameNode, yes, but not the job > tracker.) > > Just wondering if this behavior sounds reasonable, or if perhaps there might > be a bigger problem at play here. Anyone have any thoughts on the matter? > > Thanks, > > DR -- Arun C. Murthy Hortonworks Inc. http://hortonworks.com/
