"0 live nodes" that will continue to be a problem. Check the datanode logs.
-Eric On Wed, Mar 27, 2013 at 11:20 AM, Aji Janis <[email protected]> wrote: > > I removed everything under /opt/hadoop-data/hadoop/hdfs/data/current/ > because it seemed like old files were hanging around and I had to remove > them before I can start re-initialization. > > > I didn't move anything to /tmp or try reboot. > my old accumulo instance had everything under /accumulo (in hdfs) and its > still there but i m guessing me deleting stuff from hadoop-data has deleted > a bunch of its stuff. > > i tried to restart zookeeper and hadoop and it came up fine but now my > namenode url says there 0 live nodes (instead of 5 in my cluster). Doing a > ps -ef | grep hadoop on each node in cluster however shows that hadoop is > running.... so i am not sure what I messed up. Suggestions? > > Have I lost accumulo for good? Should I just recreate the instance? > > > On Wed, Mar 27, 2013 at 10:52 AM, Eric Newton <[email protected]>wrote: > >> Your DataNode has not started and reported blocks to the NameNode. >> >> Did you store things (zookeeper, hadoop) in /tmp and reboot? It's a >> common thing to do, and it commonly deletes everything in /tmp. If that's >> the case, you will need to shutdown hdfs and run: >> >> $ hadoop namenode -format >> >> And then start hdfs again. >> >> -Eric >> >> >> On Wed, Mar 27, 2013 at 10:47 AM, Aji Janis <[email protected]> wrote: >> >>> I see thank you. When I bring up hdfs (start-all from node with >>> jobtracker) I see the following message on url: >>> http://mynode:50070/dfshealth.jsp >>> >>> *Safe mode is ON. The ratio of reported blocks 0.0000 has not reached >>> the threshold 0.9990. Safe mode will be turned off automatically. >>> **2352 files and directories, 2179 blocks = 4531 total. Heap Size is 54 >>> MB / 888.94 MB (6%) * >>> * >>> * >>> Whats going on here? >>> >>> >>> >>> On Wed, Mar 27, 2013 at 10:44 AM, Eric Newton <[email protected]>wrote: >>> >>>> This will (eventually) delete everything created by accumulo in hfds: >>>> >>>> $ hadoop fs -rmr /accumulo >>>> >>>> Accumulo will create a new area to hold your configurations. Accumulo >>>> will basically abandon that old configuration. There's a class that can be >>>> used to clean up old accumulo instances in zookeeper: >>>> >>>> $ ./bin/accumulo org.apache.accumulo.server.util.CleanZookeeper >>>> hostname:port >>>> >>>> Where "hostname:port" is the name of one of your zookeeper hosts. >>>> >>>> -Eric >>>> >>>> >>>> >>>> On Wed, Mar 27, 2013 at 10:29 AM, Aji Janis <[email protected]> wrote: >>>> >>>>> Thanks Eric. But shouldn't I be cleaning up something in the >>>>> hadoop-data directory too? and Zookeeper? >>>>> >>>>> >>>>> >>>>> On Wed, Mar 27, 2013 at 10:27 AM, Eric Newton >>>>> <[email protected]>wrote: >>>>> >>>>>> To re-initialize accumulo, bring up zookeeper and hdfs. >>>>>> >>>>>> $ hadoop fs -rmr /accumulo >>>>>> $ ./bin/accumulo init >>>>>> >>>>>> I do this about 100 times a day on my dev box. :-) >>>>>> >>>>>> -Eric >>>>>> >>>>>> >>>>>> On Wed, Mar 27, 2013 at 10:10 AM, Aji Janis <[email protected]>wrote: >>>>>> >>>>>>> Hello, >>>>>>> >>>>>>> We have the following set up: >>>>>>> >>>>>>> zookeeper - 3.3.3-1073969 >>>>>>> hadoop - 0.20.203.0 >>>>>>> accumulo - 1.4.2 >>>>>>> >>>>>>> Our zookeeper crashed for some reason. I tried to doing a clean stop >>>>>>> of everything and then brought up (in order) zookeeper and hadoop >>>>>>> (cluster). But when trying to do a start-all on accumulo I get the >>>>>>> following message gets infinitely printed to the screen: >>>>>>> >>>>>>> “26 12:45:43,551 [server.Accumulo] INFO : Waiting for accumulo to be >>>>>>> initialized” >>>>>>> >>>>>>> >>>>>>> >>>>>>> Doing some digging on the web it seems that accumulo is hosed and >>>>>>> needs some re-intialization. It also appears that may be I need to clean >>>>>>> out things from zookeeper and hadoop prior to a re-initialization. Has >>>>>>> any >>>>>>> one done this before? Can someone please provide me some directions on >>>>>>> what >>>>>>> to do (or not to do)? Really appreciate help on this. Thanks. >>>>>>> >>>>>> >>>>>> >>>>> >>>> >>> >> >
