What is your ifconfig output looking like?
On Wed, Sep 15, 2010 at 10:07 PM, Michael Scott <[email protected]> wrote: > Thanks for the continued advice. I am still confused by the different > behaviors of hadoop and hbase. As I said before, I can't get hbase to work > on any of the ports that hadoop works on, so I guess hadoop and hbase are > using different interfaces. Why is this, and can't I ask hbase to use the > interface that hadoop uses? What interfaces are hadoop and hbase using? > > Also (and maybe this is the wrong forum for this question), how can I get my > OS to allow me to open 60000 using the IP address? I have temporarily > disabled selinux and iptables, as I thought that this would simply allow all > port connections. Still, this works just fine: > bash-4.0$ nc -l 60000 > /tmp/nc.out > > but this does not: > bash-4.0$ nc -l 97.86.88.18 60000 > /tmp/nc.out > (returns "nc: Cannot assign requested address"; I get the same error for the > hostname instead of the IP address, and for 10.0.0.1, but 10.0.0.0 is > allowed) > > I am trying to get hbase running for a socorro server, which will running > locally. I don't know if that matters. > > Thanks, > Michael > > On Wed, Sep 15, 2010 at 6:04 PM, Ryan Rawson <[email protected]> wrote: > >> Hey, >> >> If you bind to localhost you wont actually be reachable by anyone! >> >> The question is why is your OS disallowing binds to a specific >> interface/port combo? >> >> HBase does not really run in a blended/multihomed environment... >> meaning if you have multiple interfaces, you have to choose one that >> we work over. This is because we need to know a singular canonical >> IP/name for any given server because we put that info up inside >> ZooKeeper and META tables. So it's not just an artificial constraint, >> but exists for cluster management needs. >> >> Having said that, we do work on multihomed machines, eg: ec2, you >> might bind hbase to the internal interface taking advantage of the >> unmetered/faster network. Also better for security as well. >> >> Let us know if you need more background on how we use the network and why. >> -ryan >> >> On Wed, Sep 15, 2010 at 10:18 AM, Michael Scott <[email protected]> >> wrote: >> > Hi again, >> > >> > I think the hbase server master is not starting because it is attempting >> to >> > open port 60000 on its public IP address, rather than using localhost. I >> > cannot seem to figure out how to force it (well, configure it) to attempt >> to >> > bind to localhost:60000 instead. As far as I can see, this is set in >> the >> > file: >> > >> > org/apache/hadoop/hbase/master/HMaster.java >> > >> > I don't know much about java, so I'd prefer not to edit the source if >> there >> > is an option, but I will if necessary. Can someone please point me to >> the >> > way to change this setting? Any help would be greatly appreciated. >> > >> > Thanks, >> > Michael >> > >> > On Wed, Sep 15, 2010 at 12:42 AM, Michael Scott <[email protected] >> >wrote: >> > >> >> Hi again, >> >> >> >> IPV6 was enabled. I shut it off, rebooted to be sure, verified it was >> >> still off, and encountered the same problem once again. >> >> >> >> I also tried to open port 60000 by hand with a small php file. I can do >> >> this (as any user) for localhost. I can NOT do this (not even as root) >> for >> >> the IP address which matches the fully qualified domain name, which is >> what >> >> hbase is trying to use. Is there some way for me to configure hbase to >> use >> >> localhost instead of the fully qualified domain name for the master? I >> >> would have thought this was done by default, or that there would be an >> >> obvious line in some conf file, but I can't find it. >> >> >> >> Thanks again, >> >> >> >> Michael >> >> >> >> On Tue, Sep 14, 2010 at 12:23 PM, Todd Lipcon <[email protected]> >> wrote: >> >> >> >>> Hi Michael, >> >>> >> >>> It might be related to IPV6. Do you have IPV6 enabled on this machine? >> >>> >> >>> Check out this hadoop JIRA that might be related for some tips: >> >>> https://issues.apache.org/jira/browse/HADOOP-6056 >> >>> >> >>> <https://issues.apache.org/jira/browse/HADOOP-6056>-Todd >> >>> >> >>> On Tue, Sep 14, 2010 at 10:17 AM, Michael Scott <[email protected] >> >>> >wrote: >> >>> >> >>> > That's correct. I tried a number of different ports to see if there >> was >> >>> > something weird, and then I shut down the hadoop server and tried to >> >>> > connect >> >>> > to 50010 (which of course should have been free at that point) but >> got >> >>> the >> >>> > same "cannot assign to requested address" error. If I start hadoop, >> >>> > netstat >> >>> > shows a process listening on 50010. >> >>> > >> >>> > I am going to try this on a different OS, I am wondering if FC11 is >> my >> >>> > problem. >> >>> > >> >>> > Michael >> >>> > >> >>> > On Tue, Sep 14, 2010 at 11:41 AM, Stack <[email protected]> wrote: >> >>> > >> >>> > > On Tue, Sep 14, 2010 at 9:33 AM, Michael Scott < >> [email protected]> >> >>> > > wrote: >> >>> > > > I don't see why hadoop binds >> >>> > > > to a port but hbase does not (I even tried starting hbase with >> >>> hadoop >> >>> > off >> >>> > > > and binding to 50010, which hadoop uses). >> >>> > > > >> >>> > > >> >>> > > Using 50010 worked for hadoop but not for hbase? (Odd. We hadoop >> >>> > > their mechanism essentially). >> >>> > > >> >>> > > St.Ack >> >>> > > >> >>> > >> >>> >> >>> >> >>> >> >>> -- >> >>> Todd Lipcon >> >>> Software Engineer, Cloudera >> >>> >> >> >> >> >> > >> >
