You can pass hadoop conf properties through the -D option. Have you seen this? http://stackoverflow.com/questions/15490090/how-to-specify-system-property-in-hadoop-except-modify-hadoop-env-sh
This is not for system properties. The assumption is that you want to specify hadoop conf property through the command line. Regards, Shahab On Fri, Apr 18, 2014 at 2:12 PM, Andy Srine <andy.sr...@gmail.com> wrote: > Thanks for the tip. May be it's a different setting I need. Let me explain > the problem. > > I get an heap error on the command line - "Exception in thread "main" > java.lang.OutOfMemoryError: Java heap space". It woks when I set "export > HADOOP_HEAPSIZE=4096" in my env. But how can I set it via the hadoop > command line (hadoop jar ...)? Next choice would be to do it > programmatically in Java using hadoop conf. I can't really change the XML > files across the cluster. > > Regards, > Andy > > > On Thu, Apr 17, 2014 at 6:39 PM, Azuryy Yu <azury...@gmail.com> wrote: > >> Do you want add "-Xmx4g" to your MR tasks? if so, just add it as >> "mapred.child.java.opts" in the mapred-site.xml >> >> >> On Fri, Apr 18, 2014 at 9:35 AM, Andy Srine <andy.sr...@gmail.com> wrote: >> >>> Quick question. How would I pass the following JVM option to the Hadoop >>> command line? >>> >>> "-Xmx4G" >>> >>> hadoop jar <jar file> <class_name> <args> >>> >>> Thanks, >>> Andy >>> >>> >> > > > -- > Thanks, > Andy > >
