If you make sure that everything uses NTP then this becomes an irrelevant distinction.
On Thu, May 16, 2013 at 4:01 PM, Jane Wayne <jane.wayne2...@gmail.com>wrote: > yes, but that gets the current time on the server, not the hadoop cluster. > i need to be able to probe the date/time of the hadoop cluster. > > > On Tue, May 14, 2013 at 5:09 PM, Niels Basjes <ni...@basjes.nl> wrote: > > > I made a typo. I meant API (instead of SPI). > > > > Have a look at this for more information: > > > > > http://stackoverflow.com/questions/833768/java-code-for-getting-current-time > > > > > > If you have a client that is not under NTP then that should be the way to > > fix your issue. > > Once you have that getting the current time is easy. > > > > Niels Basjes > > > > > > > > On Tue, May 14, 2013 at 5:46 PM, Jane Wayne <jane.wayne2...@gmail.com > > >wrote: > > > > > niels, > > > > > > i'm not familiar with the native java spi. spi = service provider > > > interface? could you let me know if this spi is part of the hadoop > > > api? if so, which package/class? > > > > > > but yes, all nodes on the cluster are using NTP to synchronize time. > > > however, the server (which is not a part of the hadoop cluster) > > > accessing/interfacing with the hadoop cluster cannot be assumed to be > > > using NTP. will this still make a difference? and actually, this is > > > the primary reason why i need to get the date/time of the hadoop > > > cluster (need to check if the date/time of the hadooop cluster is in > > > sync with the server). > > > > > > > > > > > > On Tue, May 14, 2013 at 11:38 AM, Niels Basjes <ni...@basjes.nl> > wrote: > > > > If you have all nodes using NTP then you can simply use the native > Java > > > SPI > > > > to get the current system time. > > > > > > > > > > > > On Tue, May 14, 2013 at 4:41 PM, Jane Wayne < > jane.wayne2...@gmail.com > > > >wrote: > > > > > > > >> hi all, > > > >> > > > >> is there a way to get the current time of a hadoop cluster via the > > > >> api? in particular, getting the time from the namenode or jobtracker > > > >> would suffice. > > > >> > > > >> i looked at JobClient but didn't see anything helpful. > > > >> > > > > > > > > > > > > > > > > -- > > > > Best regards / Met vriendelijke groeten, > > > > > > > > Niels Basjes > > > > > > > > > > > -- > > Best regards / Met vriendelijke groeten, > > > > Niels Basjes > > > -- Best regards / Met vriendelijke groeten, Niels Basjes
