I tried a third time and it just worked? sudo hdfs zkfc -formatZK 2014-07-31 18:07:51,595 INFO [main] tools.DFSZKFailoverController (DFSZKFailoverController.java:<init>(140)) - Failover controller configured for NameNode NameNode at rhel1.local/10.120.5.203:8020 2014-07-31 18:07:51,791 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:zookeeper.version=3.4.3-cdh4.1.3--1, built on 01/27/2013 00:13 GMT 2014-07-31 18:07:51,791 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:host.name=rhel1.local 2014-07-31 18:07:51,792 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.version=1.7.0_60 2014-07-31 18:07:51,792 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.vendor=Oracle Corporation 2014-07-31 18:07:51,792 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.home=/usr/java/jdk1.7.0_60/jre 2014-07-31 18:07:51,792 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.class.path=/etc/hadoop/conf:/usr/lib/hadoop/lib/jersey-core-1.8.jar:/usr/lib/hadoop/lib/commons-cli-1.2.jar:/usr/lib/hadoop/lib/jaxb-impl-2.2.3-1.jar:/usr/lib/hadoop/lib/jackson-mapper-asl-1.8.8.jar:/usr/lib/hadoop/lib/jsch-0.1.42.jar:/usr/lib/hadoop/lib/asm-3.2.jar:/usr/lib/hadoop/lib/kfs-0.3.jar:/usr/lib/hadoop/lib/jsr305-1.3.9.jar:/usr/lib/hadoop/lib/commons-logging-1.1.1.jar:/usr/lib/hadoop/lib/jets3t-0.6.1.jar:/usr/lib/hadoop/lib/xmlenc-0.52.jar:/usr/lib/hadoop/lib/jetty-6.1.26.cloudera.2.jar:/usr/lib/hadoop/lib/jsp-api-2.1.jar:/usr/lib/hadoop/lib/commons-collections-3.2.1.jar:/usr/lib/hadoop/lib/jackson-core-asl-1.8.8.jar:/usr/lib/hadoop/lib/guava-11.0.2.jar:/usr/lib/hadoop/lib/zookeeper-3.4.3-cdh4.1.3.jar:/usr/lib/hadoop/lib/servlet-api-2.5.jar:/usr/lib/hadoop/lib/log4j-1.2.17.jar:/usr/lib/hadoop/lib/avro-1.7.1.cloudera.2.jar:/usr/lib/hadoop/lib/jersey-server-1.8.jar:/usr/lib/hadoop/lib/jasper-compiler-5.5.23.jar:/usr/lib/hadoop/lib/jackson-jaxrs-1.8.8.jar:/usr/lib/hadoop/lib/jline-0.9.94.jar:/usr/lib/hadoop/lib/commons-el-1.0.jar:/usr/lib/hadoop/lib/commons-io-2.1.jar:/usr/lib/hadoop/lib/commons-configuration-1.6.jar:/usr/lib/hadoop/lib/commons-net-3.1.jar:/usr/lib/hadoop/lib/jackson-xc-1.8.8.jar:/usr/lib/hadoop/lib/jasper-runtime-5.5.23.jar:/usr/lib/hadoop/lib/commons-digester-1.8.jar:/usr/lib/hadoop/lib/slf4j-api-1.6.1.jar:/usr/lib/hadoop/lib/commons-beanutils-core-1.8.0.jar:/usr/lib/hadoop/lib/commons-httpclient-3.1.jar:/usr/lib/hadoop/lib/activation-1.1.jar:/usr/lib/hadoop/lib/jetty-util-6.1.26.cloudera.2.jar:/usr/lib/hadoop/lib/commons-beanutils-1.7.0.jar:/usr/lib/hadoop/lib/commons-lang-2.5.jar:/usr/lib/hadoop/lib/snappy-java-1.0.4.1.jar:/usr/lib/hadoop/lib/junit-4.8.2.jar:/usr/lib/hadoop/lib/stax-api-1.0.1.jar:/usr/lib/hadoop/lib/commons-math-2.1.jar:/usr/lib/hadoop/lib/mockito-all-1.8.5.jar:/usr/lib/hadoop/lib/jettison-1.1.jar:/usr/lib/hadoop/lib/jaxb-api-2.2.2.jar:/usr/lib/hadoop/lib/paranamer-2.3.jar:/usr/lib/hadoop/lib/protobuf-java-2.4.0a.jar:/usr/lib/hadoop/lib/jersey-json-1.8.jar:/usr/lib/hadoop/lib/slf4j-log4j12-1.6.1.jar:/usr/lib/hadoop/lib/commons-codec-1.4.jar:/usr/lib/hadoop/.//hadoop-annotations-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop/.//hadoop-common.jar:/usr/lib/hadoop/.//hadoop-common-2.0.0-cdh4.1.3-tests.jar:/usr/lib/hadoop/.//hadoop-common-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop/.//hadoop-annotations.jar:/usr/lib/hadoop/.//hadoop-auth-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop/.//hadoop-auth.jar:/usr/lib/hadoop-hdfs/./:/usr/lib/hadoop-hdfs/lib/jersey-core-1.8.jar:/usr/lib/hadoop-hdfs/lib/commons-cli-1.2.jar:/usr/lib/hadoop-hdfs/lib/jackson-mapper-asl-1.8.8.jar:/usr/lib/hadoop-hdfs/lib/asm-3.2.jar:/usr/lib/hadoop-hdfs/lib/jsr305-1.3.9.jar:/usr/lib/hadoop-hdfs/lib/commons-logging-1.1.1.jar:/usr/lib/hadoop-hdfs/lib/xmlenc-0.52.jar:/usr/lib/hadoop-hdfs/lib/jetty-6.1.26.cloudera.2.jar:/usr/lib/hadoop-hdfs/lib/jsp-api-2.1.jar:/usr/lib/hadoop-hdfs/lib/jackson-core-asl-1.8.8.jar:/usr/lib/hadoop-hdfs/lib/guava-11.0.2.jar:/usr/lib/hadoop-hdfs/lib/zookeeper-3.4.3-cdh4.1.3.jar:/usr/lib/hadoop-hdfs/lib/servlet-api-2.5.jar:/usr/lib/hadoop-hdfs/lib/log4j-1.2.17.jar:/usr/lib/hadoop-hdfs/lib/jersey-server-1.8.jar:/usr/lib/hadoop-hdfs/lib/jline-0.9.94.jar:/usr/lib/hadoop-hdfs/lib/commons-el-1.0.jar:/usr/lib/hadoop-hdfs/lib/commons-io-2.1.jar:/usr/lib/hadoop-hdfs/lib/commons-daemon-1.0.3.jar:/usr/lib/hadoop-hdfs/lib/jasper-runtime-5.5.23.jar:/usr/lib/hadoop-hdfs/lib/jetty-util-6.1.26.cloudera.2.jar:/usr/lib/hadoop-hdfs/lib/commons-lang-2.5.jar:/usr/lib/hadoop-hdfs/lib/protobuf-java-2.4.0a.jar:/usr/lib/hadoop-hdfs/lib/commons-codec-1.4.jar:/usr/lib/hadoop-hdfs/.//hadoop-hdfs-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-hdfs/.//hadoop-hdfs-2.0.0-cdh4.1.3-tests.jar:/usr/lib/hadoop-hdfs/.//hadoop-hdfs.jar:/usr/lib/hadoop-yarn/lib/jersey-core-1.8.jar:/usr/lib/hadoop-yarn/lib/jackson-mapper-asl-1.8.8.jar:/usr/lib/hadoop-yarn/lib/asm-3.2.jar:/usr/lib/hadoop-yarn/lib/netty-3.2.4.Final.jar:/usr/lib/hadoop-yarn/lib/jackson-core-asl-1.8.8.jar:/usr/lib/hadoop-yarn/lib/jersey-guice-1.8.jar:/usr/lib/hadoop-yarn/lib/log4j-1.2.17.jar:/usr/lib/hadoop-yarn/lib/avro-1.7.1.cloudera.2.jar:/usr/lib/hadoop-yarn/lib/jersey-server-1.8.jar:/usr/lib/hadoop-yarn/lib/guice-3.0.jar:/usr/lib/hadoop-yarn/lib/commons-io-2.1.jar:/usr/lib/hadoop-yarn/lib/aopalliance-1.0.jar:/usr/lib/hadoop-yarn/lib/javax.inject-1.jar:/usr/lib/hadoop-yarn/lib/snappy-java-1.0.4.1.jar:/usr/lib/hadoop-yarn/lib/guice-servlet-3.0.jar:/usr/lib/hadoop-yarn/lib/paranamer-2.3.jar:/usr/lib/hadoop-yarn/lib/protobuf-java-2.4.0a.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-applications-distributedshell.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-api-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-site-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-common-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-api.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-site.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-nodemanager.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-tests.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-tests-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-common.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-applications-distributedshell-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-web-proxy-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-tests-2.0.0-cdh4.1.3-tests.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-resourcemanager.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-web-proxy.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-resourcemanager-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-common-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-server-nodemanager-2.0.0-cdh4.1.3.jar:/usr/lib/hadoop-yarn/.//hadoop-yarn-common.jar:/usr/lib/hadoop-0.20-mapreduce/./:/usr/lib/hadoop-0.20-mapreduce/lib/jersey-core-1.8.jar:/usr/lib/hadoop-0.20-mapreduce/lib/ant-contrib-1.0b3.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-cli-1.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/aspectjrt-1.6.5.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jaxb-impl-2.2.3-1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jackson-mapper-asl-1.8.8.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jsch-0.1.42.jar:/usr/lib/hadoop-0.20-mapreduce/lib/asm-3.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/kfs-0.3.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jsr305-1.3.9.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-logging-1.1.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jets3t-0.6.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/xmlenc-0.52.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jetty-6.1.26.cloudera.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jsp-api-2.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-collections-3.2.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jackson-core-asl-1.8.8.jar:/usr/lib/hadoop-0.20-mapreduce/lib/guava-11.0.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/servlet-api-2.5.jar:/usr/lib/hadoop-0.20-mapreduce/lib/log4j-1.2.17.jar:/usr/lib/hadoop-0.20-mapreduce/lib/avro-1.7.1.cloudera.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jersey-server-1.8.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jasper-compiler-5.5.23.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jackson-jaxrs-1.8.8.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-el-1.0.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-io-2.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-configuration-1.6.jar:/usr/lib/hadoop-0.20-mapreduce/lib/aspectjtools-1.6.5.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-net-3.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jackson-xc-1.8.8.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jasper-runtime-5.5.23.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-digester-1.8.jar:/usr/lib/hadoop-0.20-mapreduce/lib/slf4j-api-1.6.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-beanutils-core-1.8.0.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-httpclient-3.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/kfs-0.2.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/activation-1.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jetty-util-6.1.26.cloudera.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-beanutils-1.7.0.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-lang-2.5.jar:/usr/lib/hadoop-0.20-mapreduce/lib/avro-compiler-1.7.1.cloudera.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/snappy-java-1.0.4.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/junit-4.8.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/stax-api-1.0.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-math-2.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/mockito-all-1.8.5.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jettison-1.1.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jaxb-api-2.2.2.jar:/usr/lib/hadoop-0.20-mapreduce/lib/hsqldb-1.8.0.10.jar:/usr/lib/hadoop-0.20-mapreduce/lib/paranamer-2.3.jar:/usr/lib/hadoop-0.20-mapreduce/lib/protobuf-java-2.4.0a.jar:/usr/lib/hadoop-0.20-mapreduce/lib/jersey-json-1.8.jar:/usr/lib/hadoop-0.20-mapreduce/lib/commons-codec-1.4.jar:/usr/lib/hadoop-0.20-mapreduce/lib/hadoop-fairscheduler-2.0.0-mr1-cdh4.1.3.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-examples-2.0.0-mr1-cdh4.1.3.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-2.0.0-mr1-cdh4.1.3-ant.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-ant-2.0.0-mr1-cdh4.1.3.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-ant.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-2.0.0-mr1-cdh4.1.3-core.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-test.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-tools.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-core-2.0.0-mr1-cdh4.1.3.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-2.0.0-mr1-cdh4.1.3-examples.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-test-2.0.0-mr1-cdh4.1.3.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-tools-2.0.0-mr1-cdh4.1.3.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-examples.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-2.0.0-mr1-cdh4.1.3-tools.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-2.0.0-mr1-cdh4.1.3-test.jar:/usr/lib/hadoop-0.20-mapreduce/.//hadoop-core.jar 2014-07-31 18:07:51,793 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.library.path=//usr/lib/hadoop/lib/native 2014-07-31 18:07:51,801 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.io.tmpdir=/tmp 2014-07-31 18:07:51,801 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.compiler=<NA> 2014-07-31 18:07:51,801 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.name=Linux 2014-07-31 18:07:51,802 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.arch=amd64 2014-07-31 18:07:51,802 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.version=2.6.32-358.el6.x86_64 2014-07-31 18:07:51,802 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.name=root 2014-07-31 18:07:51,802 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.home=/root 2014-07-31 18:07:51,802 INFO [main] zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.dir=/etc/hbase/conf.golden_apple 2014-07-31 18:07:51,813 INFO [main] zookeeper.ZooKeeper (ZooKeeper.java:<init>(433)) - Initiating client connection, connectString=rhel1.local:2181,rhel6.local:2181,rhel2.local:2181 sessionTimeout=5000 watcher=null 2014-07-31 18:07:51,833 INFO [main-SendThread(rhel1.local:2181)] zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(958)) - Opening socket connection to server rhel1.local/10.120.5.203:2181. Will not attempt to authenticate using SASL (unknown error) 2014-07-31 18:07:51,844 INFO [main-SendThread(rhel1.local:2181)] zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(850)) - Socket connection established to rhel1.local/10.120.5.203:2181, initiating session 2014-07-31 18:07:51,852 INFO [main-SendThread(rhel1.local:2181)] zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1187)) - Session establishment complete on server rhel1.local/10.120.5.203:2181, sessionid = 0x1478902fddc000a, negotiated timeout = 5000 =============================================== The configured parent znode /hadoop-ha/golden-apple already exists. Are you sure you want to clear all failover information from ZooKeeper? WARNING: Before proceeding, ensure that all HDFS services and failover controllers are stopped! =============================================== Proceed formatting /hadoop-ha/golden-apple? (Y or N) 2014-07-31 18:07:51,858 INFO [main-EventThread] ha.ActiveStandbyElector (ActiveStandbyElector.java:processWatchEvent(538)) - Session connected. Y 2014-07-31 18:08:00,439 INFO [main] ha.ActiveStandbyElector (ActiveStandbyElector.java:clearParentZNode(314)) - Recursively deleting /hadoop-ha/golden-apple from ZK... 2014-07-31 18:08:00,506 INFO [main] ha.ActiveStandbyElector (ActiveStandbyElector.java:clearParentZNode(327)) - Successfully deleted /hadoop-ha/golden-apple from ZK. 2014-07-31 18:08:00,541 INFO [main] ha.ActiveStandbyElector (ActiveStandbyElector.java:ensureParentZNode(299)) - Successfully created /hadoop-ha/golden-apple in ZK. 2014-07-31 18:08:00,545 INFO [main-EventThread] zookeeper.ClientCnxn (ClientCnxn.java:run(511)) - EventThread shut down 2014-07-31 18:08:00,545 INFO [main] zookeeper.ZooKeeper (ZooKeeper.java:close(679)) - Session: 0x1478902fddc000a closed
On Thu, Jul 31, 2014 at 2:51 PM, Alex Newman <posi...@gmail.com> wrote: > Cheers. That's rough. We don't have that problem here at WanDISCO. > > On Thu, Jul 31, 2014 at 12:46 PM, Colin Kincaid Williams <disc...@uw.edu> > wrote: > > Hi this is drocsid / discord from #hbase. Thanks for the help earlier > today. > > Just thought I'd forward this info regarding swapping out the NameNode > in a > > QJM / HA configuration. See you around on #hbase. If you visit Seattle, > feel > > free to give me a shout out. > > > > ---------- Forwarded message ---------- > > From: Colin Kincaid Williams <disc...@uw.edu> > > Date: Thu, Jul 31, 2014 at 12:35 PM > > Subject: Re: Juggling or swaping out the standby NameNode in a QJM / HA > > configuration > > To: user@hadoop.apache.org > > > > > > Hi Jing, > > > > Thanks for the response. I will try this out, and file an Apache jira. > > > > Best, > > > > Colin Williams > > > > > > On Thu, Jul 31, 2014 at 11:19 AM, Jing Zhao <j...@hortonworks.com> > wrote: > >> > >> Hi Colin, > >> > >> I guess currently we may have to restart almost all the > >> daemons/services in order to swap out a standby NameNode (SBN): > >> > >> 1. The current active NameNode (ANN) needs to know the new SBN since in > >> the current implementation the SBN tries to send rollEditLog RPC > request to > >> ANN periodically (thus if a NN failover happens later, the original ANN > >> needs to send this RPC to the correct NN). > >> 2. Looks like the DataNode currently cannot do real refreshment for NN. > >> Look at the code in BPOfferService: > >> > >> void refreshNNList(ArrayList<InetSocketAddress> addrs) throws > >> IOException { > >> Set<InetSocketAddress> oldAddrs = Sets.newHashSet(); > >> for (BPServiceActor actor : bpServices) { > >> oldAddrs.add(actor.getNNSocketAddress()); > >> } > >> Set<InetSocketAddress> newAddrs = Sets.newHashSet(addrs); > >> > >> if (!Sets.symmetricDifference(oldAddrs, newAddrs).isEmpty()) { > >> // Keep things simple for now -- we can implement this at a later > >> date. > >> throw new IOException( > >> "HA does not currently support adding a new standby to a > running > >> DN. " + > >> "Please do a rolling restart of DNs to reconfigure the list of > >> NNs."); > >> } > >> } > >> > >> 3. If you're using automatic failover, you also need to update the > >> configuration of the ZKFC on the current ANN machine, since ZKFC will do > >> gracefully fencing by sending RPC to the other NN. > >> 4. Looks like we do not need to restart JournalNodes for the new SBN > but I > >> have not tried before. > >> > >> Thus in general we may still have to restart all the services > (except > >> JNs) and update their configurations. But this may be a rolling restart > >> process I guess: > >> 1. Shutdown the old SBN, bootstrap the new SBN, and start the new SBN. > >> 2. Keep the ANN and its corresponding ZKFC running, do a rolling restart > >> of all the DN to update their configurations > >> 3. After restarting all the DN, stop ANN and the ZKFC, and update their > >> configuration. The new SBN should become active. > >> > >> I have not tried the upper steps, thus please let me know if this > >> works or not. And I think we should also document the correct steps in > >> Apache. Could you please file an Apache jira? > >> > >> Thanks, > >> -Jing > >> > >> > >> > >> On Thu, Jul 31, 2014 at 9:37 AM, Colin Kincaid Williams <disc...@uw.edu > > > >> wrote: > >>> > >>> Hello, > >>> > >>> I'm trying to swap out a standby NameNode in a QJM / HA configuration. > I > >>> believe the steps to achieve this would be something similar to: > >>> > >>> Use the Bootstrap standby command to prep the replacment standby. Or > >>> rsync if the command fails. > >>> > >>> Somehow update the datanodes, so they push the heartbeat / journal to > the > >>> new standby > >>> > >>> Update the xml configuration on all nodes to reflect the replacment > >>> standby. > >>> > >>> Start the replacment standby > >>> > >>> Use some hadoop command to refresh the datanodes to the new NameNode > >>> configuration. > >>> > >>> I am not sure how to deal with the Journal switch, or if I am going > about > >>> this the right way. Can anybody give me some suggestions here? > >>> > >>> > >>> Regards, > >>> > >>> Colin Williams > >>> > >> > >> > >> CONFIDENTIALITY NOTICE > >> NOTICE: This message is intended for the use of the individual or entity > >> to which it is addressed and may contain information that is > confidential, > >> privileged and exempt from disclosure under applicable law. If the > reader of > >> this message is not the intended recipient, you are hereby notified > that any > >> printing, copying, dissemination, distribution, disclosure or > forwarding of > >> this communication is strictly prohibited. If you have received this > >> communication in error, please contact the sender immediately and > delete it > >> from your system. Thank You. > > > > > > >