I have a small HBase/Hadoop cluster. I can login to the master server and run commands against hbase via the hbase shell without a problem. However, when I try to do the same thing from a remote machine I get the below error:
ERROR: 20000 millis timeout while waiting for channel to be ready for connect. h : java.nio.channels.SocketChannel[connection-pending remote=/10.175.224.75:6000]
I ran a netstat on the master server to confirm it was listening on port 60000 and got the following (x.x.x.x is the ip address of the master server).
tcp 0 0 x.x.x.x:60000 : LISTEN
I believe this means that the master server is only listening for connections on port 60000 that originate from itself. Is there a way to configure HBase to accept remote connections? Here is my hbase-site.xml.
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>hbase.master</name>
<value>master:60000</value>
<description>The host and port that the HBase master runs at.
TODO: Support 'local' (All running in single context).
</description>
</property>
<property>
<name>hbase.rootdir</name>
<value>hdfs://master:9000/hbase</value>
<description>The directory shared by RegionServers.
</description>
</property>
<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
<description>The mode the cluster will be in. Possible values are
false: standalone and pseudo-distributed setups with managed Zookeeper
true: fully-distributed with unmanaged Zookeeper Quorum (see hbase-env.sh)
</description>
</property>
<property>
<name>hbase.zookeeper.quorum</name>
<value>localhost</value>
</property>
<property>
<name>zookeeper.znode.parent</name>
<value>/master</value>
</property>
<property>
<name>hbase.zookeeper.property.dataDir</name>
<value>/home/hduser/hbase/zookeeper</value>
</property>
</configuration>
Related
I am a beginner to hadoop and HDFS, Now I have a situation where I need to connect 3 different PC having a file, NIFI and Hadop+HDFS.
Machine 1 : Will have a .csv file
Machine 2(Personal laptop): Will have my NIFI running to it.
Machine 3(Running at my office) : will have Hadoop+HDFS in it.
Now I would like to send a csv file from machine 1 to my database running on machine 3 using nifi which is running on machine 2.
I connect to machine 3 using ssh connection which is basically a router at my office.
Question:How can I connect to machine 3 from machine 2 which has nifi which can send the file to my hadoop hbase.
Should I use public key as configuration or should I use a different setup or server?
My configuration of files of haddo and hdfs are as follows
hbase-site.xml
<configuration>
<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
</property>
<property>
<name>hbase.rootdir</name>
<value>hdfs://localhost:9000/hbase</value>
</property>
<property>
<name>hbase.zookeeper.property.clientPort</name>
<value>2222</value>
</property>
<property>
<name>hbase.zookeeper.property.dataDir</name>
<value>/home/hadoop/zookeeper</value>
</property>
</configuration>
<property>
<name>hbase.wal.provider</name>
<value>filesystem</value>
</property>
<property>
<name>hbase.tmp.dir</name>
<value>./tmp</value>
</property>
</configuration>
core-site.xml
<configuration>
<property>
<name>hadoop.tmp.dir</name>
<value>/home/hdoop/tmpdata</value>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
hdfs-site.xml
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.name.dir</name>
<value>file:///home/hadoop/hdfs/namenode</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>file:///home/hadoop/hdfs/datanode</value>
</property>
</configuration>
Look in to the configuration files and let me know where I need to change the properties and also I have install til now the psudo distributed mode HDFS in machine 3.
Pseudo distributed and fully distributed aren't any different.
You say only machine 3 has HDFS. Therefore only it needs to be running a Namenode and Datanode, setup in a distributed fashion, meaning that external clients will be able to communicate with it.
More specifically, no config file should be using localhost and should instead use LAN IP or hostnames
I have installed hadoop(1.2.1) multinode on 1 master and 2 slaves. Now I am trying to install hbase over it. The problem is that when I start hbase on the master, it only shows one regionserver(the master itself) while the slaves are not being shown on the web browser. On the terminal each slave has its own regionserver but that is not reflected on the browser. Can anyone tell me as to what the problem is?
I had same problem, i solve it by adding port number in hbase.rootdir
And your hbase-site.xml should look like this
<property>
<name>hbase.zookeeper.quorum</name>
<value>master-IP-Adress,slave1-IP,slave2-IP</value>
<description>The directory shared by RegionServers.
</description>
</property>
<property>
<name>hbase.zookeeper.property.dataDir</name>
<value>/home/ravi/zookeeper-data</value>
<description>Property from ZooKeeper config zoo.cfg.
The directory where the snapshot is stored.
</description>
</property>
<property>
<name>hbase.rootdir</name>
<value>hdfs://master-IP:50000/hbase</value>
<description>The directory shared by RegionServers.
</description>
</property>
<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
<description>The mode the cluster will be in. Possible values are
false: standalone and pseudo-distributed setups with managed Zookeeper
true: fully-distributed with unmanaged Zookeeper Quorum (see hbase-env.sh)
</description>
</property>
I am having trouble connection to my NameNode server from another server on the cluster. the namenode starts fine and i can get to the namenode dashboard browsing to http://localhost:50070, but trying to browse to http://hadoop-cluster-1:50070 or even using the IP address doesn't work. I am able to ping hadoop-cluster-1 and the IP address. I am also able to traceroute the port and host all from the server that i am getting an "Unable to connect" in Firefox. See below for values files.
core-site.xml
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://hadoop-cluster-1.com:8020</value>
</property>
<property>
<name>io.file.buffer.size</name>
<value>8192</value>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://hadoop-cluster-1:8020</value>
</property>
</configuration>
hdfs-site.xml
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://hadoop-cluster-1:8020</value>
<description>The port where the NameNode runs the HDFS protocol.
Combined with the NameNode's hostname to build its address.
</description>
</property>
<property>
<name>dfs.namenode.rpc-address</name>
<value>hadoop-cluster-1:8020</value>
<description>
RPC address that handles all clients requests. In the case of HA/Federation where multiple namenodes exist, the name ser
vice id is added to the name e.g. dfs.namenode.rpc-address.ns1 dfs.namenode.rpc-address.EXAMPLENAMESERVICE The value of this propert
y will take the form of nn-host1:rpc-port.
</description>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:///data/nn1,file:///data/nn2</value>
</property>
<property>
<name>dfs.blocksize</name>
<value>131072</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:///data/data1</value>
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
</configuration>
I have 8 slave computers and 1 master computer for running Hadoop (ver 0.21)
some datanodes of cluster are suddenly disconnected while I was running MapReduce code on 10GB data
After all mappers finished and around 80% of reducers was processed, randomly one or more datanode disconned from network.
and then the other datanodes start to disappear from network even if I killed the MapReduce job when I found some datanode was disconnected.
I've tried to change dfs.datanode.max.xcievers to 4096, turned off fire-walls of all computing node, disabled selinux and increased the number of file open limit to 20000
but they didn't work at all...
anyone have a idea to solve this problem?
followings are error log from mapreduce
12/06/01 12:31:29 INFO mapreduce.Job: Task Id : attempt_201206011227_0001_r_000006_0, Status : FAILED
java.io.IOException: Bad connect ack with firstBadLink as ***.***.***.148:20010
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:889)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:820)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:427)
and followings are logs from datanode
2012-06-01 13:01:01,118 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_-5549263231281364844_3453 src: /*.*.*.147:56205 dest: /*.*.*.142:20010
2012-06-01 13:01:01,136 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(*.*.*.142:20010, storageID=DS-1534489105-*.*.*.142-20010-1337757934836, infoPort=20075, ipcPort=20020) Starting thread to transfer block blk_-3849519151985279385_5906 to *.*.*.147:20010
2012-06-01 13:01:19,135 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(*.*.*.142:20010, storageID=DS-1534489105-*.*.*.142-20010-1337757934836, infoPort=20075, ipcPort=20020):Failed to transfer blk_-5797481564121417802_3453 to *.*.*.146:20010 got java.net.ConnectException: > Connection timed out
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:701)
at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:373)
at org.apache.hadoop.hdfs.server.datanode.DataNode$DataTransfer.run(DataNode.java:1257)
at java.lang.Thread.run(Thread.java:722)
2012-06-01 13:06:20,342 INFO org.apache.hadoop.hdfs.server.datanode.DataBlockScanner: Verification succeeded for blk_6674438989226364081_3453
2012-06-01 13:09:01,781 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(*.*.*.142:20010, storageID=DS-1534489105-*.*.*.142-20010-1337757934836, infoPort=20075, ipcPort=20020):Failed to transfer blk_-3849519151985279385_5906 to *.*.*.147:20010 got java.net.SocketTimeoutException: 480000 millis timeout while waiting for channel to be ready for write. ch : java.nio.channels.SocketChannel[connected local=/*.*.*.142:60057 remote=/*.*.*.147:20010]
at org.apache.hadoop.net.SocketIOWithTimeout.waitForIO(SocketIOWithTimeout.java:246)
at org.apache.hadoop.net.SocketOutputStream.waitForWritable(SocketOutputStream.java:164)
at org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:203)
at org.apache.hadoop.hdfs.server.datanode.BlockSender.sendChunks(BlockSender.java:388)
at org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:476)
at org.apache.hadoop.hdfs.server.datanode.DataNode$DataTransfer.run(DataNode.java:1284)
at java.lang.Thread.run(Thread.java:722)
hdfs-site.xml
<configuration>
<property>
<name>dfs.name.dir</name>
<value>/home/hadoop/data/name</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>/home/hadoop/data/hdfs1,/home/hadoop/data/hdfs2,/home/hadoop/data/hdfs3,/home/hadoop/data/hdfs4,/home/hadoop/data/hdfs5</value>
</property>
<property>
<name>dfs.replication</name>
<value>3</value>
</property>
<property>
<name>dfs.datanode.max.xcievers</name>
<value>4096</value>
</property>
<property>
<name>dfs.http.address</name>
<value>0.0.0.0:20070</value>
<description>50070
The address and the base port where the dfs namenode web ui will listen on.
If the port is 0 then the server will start on a free port.
</description>
</property>
<property>
<name>dfs.datanode.http.address</name>
<value>0.0.0.0:20075</value>
<description>50075
The datanode http server address and port.
If the port is 0 then the server will start on a free port.
</description>
</property>
<property>
<name>dfs.secondary.http.address</name>
<value>0.0.0.0:20090</value>
<description>50090
The secondary namenode http server address and port.
If the port is 0 then the server will start on a free port.
</description>
</property>
<property>
<name>dfs.datanode.address</name>
<value>0.0.0.0:20010</value>
<description>50010
The address where the datanode server will listen to.
If the port is 0 then the server will start on a free port.
</description>
<property>
<name>dfs.datanode.ipc.address</name>
<value>0.0.0.0:20020</value>
<description>50020
The datanode ipc server address and port.
If the port is 0 then the server will start on a free port.
</description>
</property>
<property>
<name>dfs.datanode.https.address</name>
<value>0.0.0.0:20475</value>
</property>
<property>
<name>dfs.https.address</name>
<value>0.0.0.0:20470</value>
</property>
</configuration>
mapred-site.xml
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>masternode:29001</value>
</property>
<property>
<name>mapred.system.dir</name>
<value>/home/hadoop/data/mapreduce/system</value>
</property>
<property>
<name>mapred.local.dir</name>
<value>/home/hadoop/data/mapreduce/local</value>
</property>
<property>
<name>mapred.map.tasks</name>
<value>32</value>
<description> default number of map tasks per job.</description>
</property>
<property>
<name>mapred.tasktracker.map.tasks.maximum</name>
<value>4</value>
</property>
<property>
<name>mapred.reduce.tasks</name>
<value>8</value>
<description> default number of reduce tasks per job.</description>
</property>
<property>
<name>mapred.map.child.java.opts</name>
<value>-Xmx2048M</value>
</property>
<property>
<name>io.sort.mb</name>
<value>500</value>
</property>
<property>
<name>mapred.task.timeout</name>
<value>1800000</value> <!-- 30 minutes -->
</property>
<property>
<name>mapred.job.tracker.http.address</name>
<value>0.0.0.0:20030</value>
<description> 50030
The job tracker http server address and port the server will listen on.
If the port is 0 then the server will start on a free port.
</description>
</property>
<property>
<name>mapred.task.tracker.http.address</name>
<value>0.0.0.0:20060</value>
<description> 50060
</property>
</configuration>
Try configuring the max.xcievers in conf/hdfs-site.xml http://hbase.apache.org/book.html#dfs.datanode.max.xcievers:
<property>
<name>dfs.datanode.max.xcievers</name>
<value>4096</value>
</property>
I run hbase in a distributed mode. Hbase starts region servers java processes on all nodes, but web ui doesn' show them
http://s1.ipicture.ru/uploads/20120517/16DXTnsU.png
here is hbase-site.xml
<configuration>
<property>
<name>hbase.zookeeper.quorum</name>
<value>10.3.6.44</value>
</property>
<property>
<name>hbase.zookeeper.property.dataDir</name>
<value>/home/hadoop/hdfs/zookeeper</value>
</property>
<property>
<name>hbase.rootdir</name>
<value>hdfs://10.3.6.44:9000/hbase</value>
</property>
<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
</property>
btw hadoop cluster is running normally and sees all the datanodes
thanks very much for your help.
problem was with dns and hosts file.
Add this property to your hbase-site.xml file and see if it works for you
name - hbase.zookeeper.property.clientPort
value - 2181