Actually, its the other way around (thanks Sandy for catching this error in my post). The presence of mapreduce.map|reduce.java.opts overrides mapred.child.java.opts, not the other way round as I had stated earlier (below).
On Wed, Dec 4, 2013 at 1:28 PM, Harsh J <ha...@cloudera.com> wrote: > Yes but the old property is yet to be entirely removed (removal of > configs is graceful). > > These properties were introduced to provide more fine-tuned way to > configure each type of task separately, but the older value continues > to be accepted if present; the current behaviour is that if the MR > runtime finds mapred.child.java.opts configured, it will override > values of mapreduce.map|reduce.java.opts configs. To configure > mapreduce.map|reduce.java.opts therefore, you should make sure you > aren't passing mapred.child.java.opts (which is also no longer in the > mapred-default.xml intentionally). > > On Wed, Dec 4, 2013 at 12:56 PM, Henry Hung <ythu...@winbond.com> wrote: >> Hello, >> >> >> >> I have a question. >> >> Is it correct to say that in hadoop-2.2.0, the mapred-site.xml node >> "mapred.child.java.opts” is replaced by two new node >> “mapreduce.map.java.opts” and “mapreduce.reduce.java.opts”? >> >> >> >> Best regards, >> >> Henry >> >> >> ________________________________ >> The privileged confidential information contained in this email is intended >> for use only by the addressees as indicated by the original sender of this >> email. If you are not the addressee indicated in this email or are not >> responsible for delivery of the email to such a person, please kindly reply >> to the sender indicating this fact and delete all copies of it from your >> computer and network server immediately. Your cooperation is highly >> appreciated. It is advised that any unauthorized use of confidential >> information of Winbond is strictly prohibited; and any information in this >> email irrelevant to the official business of Winbond shall be deemed as >> neither given nor endorsed by Winbond. > > > > -- > Harsh J -- Harsh J
