I can also add that there is no such issue with DiskBackedMessageStore. It successfully creates a large number of store files, and never starts failing. On Sep 12, 2013 2:11 PM, "Alexander Asplund" <alexaspl...@gmail.com> wrote:
> It's very strange.. it is definitely failing on some partitions.. > currently the disk size of a offloading worker corresponda about to the > size of its part of the graph... but the worker attempts to create > additional partitions, and this fails. > On Sep 12, 2013 2:07 PM, "Alexander Asplund" <alexaspl...@gmail.com> > wrote: > >> Actually, I take that back. It seems it does succeeded in creating >> partitions - it just struggles with it sometimes. Should I be worried about >> these errors if partition directories seem to be filling up? >> On Sep 11, 2013 6:38 PM, "Claudio Martella" <claudio.marte...@gmail.com> >> wrote: >> >>> Giraph does not offload partitions or messages to HDFS in the >>> out-of-core module. It uses local disk on the computing nodes. By defualt, >>> it uses the tasktracker local directory where for example the distributed >>> cache is stored. >>> >>> Could you provide the stacktrace Giraph is spitting when failing? >>> >>> >>> On Thu, Sep 12, 2013 at 12:54 AM, Alexander Asplund < >>> alexaspl...@gmail.com> wrote: >>> >>>> Hi, >>>> >>>> I'm still trying to get Giraph to work on a graph that requires more >>>> memory that is available. The problem is that when the Workers try to >>>> offload partitions, the offloading fails. The DiskBackedPartitionStore >>>> fails to create the directory >>>> _bsp/_partitions/job-xxxx/part-vertices-xxx (roughly from recall). >>>> >>>> The input or computation will then continue for a while, which I >>>> believe is because it is still managing to hold everything in memory - >>>> but at some point it reaches the limit where there simply is no more >>>> heap space, and it crashes with OOM. >>>> >>>> Has anybody had this problem with giraph failing to make HDFS >>>> directories? >>>> >>> >>> >>> >>> -- >>> Claudio Martella >>> claudio.marte...@gmail.com >>> >>
