I am new to HBase and I am sure i installed it correctly. On my terminal, I am able to start hbase shell also but even a simple create statement gives me the following error :
(Note : I am trying to run it on stand alone mode)
WARN zookeeper.ZKUtil: hconnection Unable to set watcher on znode (/hbase/hbaseid)
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid
at org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1041)
at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:193)
at org.apache.hadoop.hbase.zookeeper.ZKUtil.checkExists(ZKUtil.java:450)
at org.apache.hadoop.hbase.zookeeper.ClusterId.readClusterIdZNode(ClusterId.java:61)
........
Also, I have written only 2 lines in eclipse and I try to run it,
public static void main(String[] args) throws MasterNotRunningException, ZooKeeperConnectionException {
// TODO Auto-generated method stub
Configuration config = HBaseConfiguration.create();
HBaseAdmin admin = new HBaseAdmin(config);
}
it gives me the following error :
15/03/18 22:25:37 INFO zookeeper.ClientCnxn: Opening socket connection to server fe80:0:0:0:0:0:0:1%1/fe80:0:0:0:0:0:0:1%1:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration)
15/03/18 22:25:38 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:599)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)
What could possible be the issue?
I have my /etc/hosts file as 127.0.0.1 localhost.
Anything else that I need to do or change?
http://hbase.apache.org/book.html#quickstart Here is very good documentation to setup hbase. you might be missing some configurations.
Related
we have some issue with ambari-metrics-collector service , ( we have HDP cluster version - 2.6.4 with 8 nodes )
ambari metrics collector service can’t start or start of few second then failed
the details about metrics collector version
rpm -qa | grep metrics
ambari-metrics-grafana-2.6.1.0-143.x86_64
ambari-metrics-monitor-2.6.1.0-143.x86_64
ambari-metrics-collector-2.5.0.3-7.x86_64
ambari-metrics-hadoop-sink-2.6.1.0-143.x86_64
all machines are rhel 7.2
we performed the following steps in order to resolve the problem
1.restart metrics-collector service
su - ams -c '/usr/sbin/ambari-metrics-collector --config /etc/ambari-metrics-collector/conf/ stop'
su - ams -c '/usr/sbin/ambari-metrics-collector --config /etc/ambari-metrics-collector/conf/ start'
or
ambari-metrics-collector stop
ambari-metrics-collector start
2.restart ambari-metrics-monitor on all nodes
ambari-metrics-monitor stop
ambari-metrics-monitor start
3.clean the folder /var/lib/ambari-metrics-collector/hbase-tmp/zookeeper/
mv /var/lib/ambari-metrics-collector/hbase-tmp/zookeeper/zookeeper_0 /tmp/bck/zookeeper/
Then restart metrics-collector service
4.Tuning the metrics-collector parameters according - https://docs.cloudera.com/HDPDocuments/Ambari-2.2.1.0/bk_ambari_reference_guide/content/_ams_general_guidelines.html
we update the follwing parameters in ambari
metrics_collector_heap_size=1024
hbase_regionserver_heapsize=1024
hbase_master_heapsize=512
hbase_master_xmn_size=128
status for now: - steps 1-4 doesn’t help
From the logs we can see the following:
log file - ambari-metrics-collector.log
2020-06-25 09:06:14,474 WARN org.apache.zookeeper.ClientCnxn: Session 0x172eab71f310002 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)
2020-06-25 09:06:14,575 WARN org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper, quorum=master02.sys671.com:61181, exception=org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /ams-hbase-unsecure/meta-region-server
log file - hbase-ams-master-master02.sys671.com.log
2020-06-25 09:38:18,799 WARN [RS:0;master02:51842-SendThread(master02.sys671.com:61181)] zookeeper.ClientCnxn: Session 0x172ead5d73a0004 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1125)
2020-06-25 09:38:20,437 INFO [main-SendThread(master02.sys671.com:61181)] zookeeper.ClientCnxn: Opening socket connection to server master02.sys671.com/23.2.35.171:61181. Will not attempt to authenticate using SASL (unknown error)
2020-06-25 09:38:20,438 WARN [main-SendThread(master02.sys671.com:61181)] zookeeper.ClientCnxn: Session 0x172ead5d73a0002 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
we also not see that port is listening ( timeline.metrics.service.webapp.address )
netstat -tulpn | grep 6188
any advice how to continue from this point ?
we'll appreciate to get any help about this problem
I have a Storm cluster with 1 Nimbus, 4 Supervisors and 2 Zookeeper nodes. My Storm.yaml is as following:
storm.zookeeper.servers:
- "storage14"
- "storage15"
nimbus.seeds: ["storage01"]
#storm.local.hostname: "storage05"
supervisor.supervisors:
- "storage02"
- "storage03"
- "storage04"
- "storage05"
storm.local.dir: "/tmp/storm"
worker.childopts: "-Xmx%HEAP-MEM%m -XX:+PrintGCDetails -Xloggc:artifacts/gc.log -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=artifacts/heapdump"
This storm.yaml file is used by both Nimbus and Supervisors. When Nimbus is started I have the storm.local.hostname commented out as is shown above.
However, when starting Supervisors on respective nodes, I uncomment the storm.local.hostname and set it to the hostname of the node on which the supervisor is being launched. For instance if I was launching the supervisor on storage05, the storm.yaml file would have the following additional config param:
storm.local.hostname: "storage05"
The problem is even though Nimubs is launched successfully and I can see it on the Storm UI, some supervisors do not seem to be able to connect to Nimbus. For instance of the 4 nodes I start supervisors on, Storm UI often shows only 2 of them connected. However, if I ssh in to these nodes and run jps, I can see that the supervisor process is running on ALL of these nodes.
The Supervisors at the nodes which do end up connecting are not the same always, so it is definitely not a problem with those specific nodes.
Another thing to notice is if I try to execute a topology on whatever nodes that got connected, it does not get registered by the cluster and I can not see that topology on the UI either.
What do you think might be causing this erratic behavior?
UPDATE:
Tail end of nimbus.log has the following lines
2017-01-25 00:04:25.216 o.a.s.s.o.a.z.ClientCnxn [WARN] Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:701)
at org.apache.storm.shade.org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
at org.apache.storm.shade.org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
2017-01-25 00:04:25.317 o.a.s.s.o.a.z.ClientCnxn [INFO] Opening socket connection to server storage15/192.168.140.195:2181. Will not attempt to authenticate using SASL (unknown error)
2017-01-25 00:04:25.317 o.a.s.s.o.a.z.ClientCnxn [WARN] Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:701)
at org.apache.storm.shade.org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
at org.apache.storm.shade.org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
2017-01-25 00:04:25.686 o.a.s.s.o.a.z.ClientCnxn [INFO] Opening socket connection to server storage15/192.168.140.195:2181. Will not attempt to authenticate using SASL (unknown error)
2017-01-25 00:04:25.686 o.a.s.s.o.a.z.ClientCnxn [WARN] Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:701)
at org.apache.storm.shade.org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
at org.apache.storm.shade.org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
2017-01-25 00:04:25.787 o.a.s.s.o.a.z.ClientCnxn [INFO] Opening socket connection to server storage14/192.168.140.194:2181. Will not attempt to authenticate using SASL (unknown error)
2017-01-25 00:04:25.787 o.a.s.s.o.a.z.ClientCnxn [WARN] Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:701)
at org.apache.storm.shade.org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
at org.apache.storm.shade.org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
Your UPDATE (nimbus log) indicates that your Nimbus cannot connect Zookeeper cluster. Please check that Zookeeper cluster (storage14/storage15) is accessible from storage01 (not only node is accessible, but also do telnet to Zookeeper server via "telnet storage14 (and/or storage15) 2181").
When ZK connectivity issue is gone please try starting supervisor again.
This is the output file of running the java program remotely.
> Opening socket connection to server, Will not attempt to authenticate using SASL error, I'm facing this error, when i'm connecting remotely only.
15/10/01 17:00:21 INFO zookeeper.ClientCnxn: Opening socket connection to server quickstart.cloudera/192.168.0.106:2181. Will not attempt to authenticate using SASL (unknown error)
15/10/01 17:00:21 INFO zookeeper.ClientCnxn: Socket connection established, initiating session, client: /192.168.0.105:63654, server: quickstart.cloudera/192.168.0.106:2181
15/10/01 17:00:21 INFO zookeeper.ClientCnxn: Session establishment complete on server quickstart.cloudera/192.168.0.106:2181, sessionid = 0x150220e67060034, negotiated timeout = 60000
15/10/01 17:00:21 WARN util.DynamicClassLoader: Failed to identify the fs of dir hdfs://quickstart.cloudera:8020/hbase/lib, ignored
java.io.IOException: No FileSystem for scheme: hdfs
This is the output file of running the java program locally.
15/10/01 13:22:36 INFO zookeeper.ClientCnxn: Opening socket connection to server /127.0.0.1:2181
15/10/01 13:22:36 INFO client.ZooKeeperSaslClient: Client will not SASL-authenticate because the default JAAS configuration section 'Client' could not be found. If you are not using SASL, you may ignore this. On the other hand, if you expected SASL to work, please fix your JAAS configuration.
15/10/01 13:22:36 INFO zookeeper.ClientCnxn: Socket connection established to quickstart.cloudera/127.0.0.1:2181, initiating session
15/10/01 13:22:36 INFO zookeeper.ClientCnxn: Session establishment complete on server quickstart.cloudera/127.0.0.1:2181, sessionid = 0x150220e67060028, negotiated timeout = 60000
15/10/01 13:22:36 WARN util.DynamicClassLoader: Failed to identify the fs of dir hdfs://quickstart.cloudera:8020/hbase/lib, ignored
java.io.IOException: No FileSystem for scheme: hdfs
My questions are:
Am I not able to create a new table in hbase remotely?
Is there any issue from output file related to my question?
Yes, you are able to create new tables and perform any other operation with
HBase remotely.
Looks like your error means that you don't add Hadoop or HBase libraries
properly to your project. As a result your program couldn't find classes of HDFS file system.
Do you add jars to your project directly or use Maven/Gradle? What dependencies your project have in addition to HBase?
I have added ojdbc.jar file in /usr/lib/sqoop/lib and I am trying to connect oracle to hadoop using sqoop but facing error.
I am using following command:
sqoop list-tables --connect jdbc:oracle:thin://#192.162.2.8:1521:orcl --username hr --password abc
But the i get following error:
15/05/05 09:21:31 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
15/05/05 09:21:32 ERROR manager.OracleManager: Failed to rollback transaction
java.lang.NullPointerException
at com.cloudera.sqoop.manager.OracleManager.listTables(OracleManager.java:596)
at com.cloudera.sqoop.tool.ListTablesTool.run(ListTablesTool.java:49)
at com.cloudera.sqoop.Sqoop.run(Sqoop.java:144)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at com.cloudera.sqoop.Sqoop.runSqoop(Sqoop.java:180)
at com.cloudera.sqoop.Sqoop.runTool(Sqoop.java:218)
at com.cloudera.sqoop.Sqoop.main(Sqoop.java:228)
15/05/05 09:21:32 ERROR manager.OracleManager: Failed to list tables
java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:489)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:553)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:254)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:528)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at com.cloudera.sqoop.manager.OracleManager.makeConnection(OracleManager.java:275)
at com.cloudera.sqoop.manager.GenericJdbcManager.getConnection(GenericJdbcManager.java:51)
at com.cloudera.sqoop.manager.OracleManager.listTables(OracleManager.java:585)
at com.cloudera.sqoop.tool.ListTablesTool.run(ListTablesTool.java:49)
at com.cloudera.sqoop.Sqoop.run(Sqoop.java:144)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at com.cloudera.sqoop.Sqoop.runSqoop(Sqoop.java:180)
at com.cloudera.sqoop.Sqoop.runTool(Sqoop.java:218)
at com.cloudera.sqoop.Sqoop.main(Sqoop.java:228)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:439)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:454)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:693)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:251)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1140)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:340)
... 16 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:149)
at oracle.net.nt.ConnOption.connect(ConnOption.java:133)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:405)
is there anyhthing wrong with the sqoop command.?
The error "network adaptor could not establish connection" is coming because of incorrect jdbc url. Jdbc url in your sqoop command should be in this format: jdbc:oracle:thin:#192.162.2.8:1521:orcl
The connection refused error may occur by scenarios as far as I know.
The Oracle service might not be running on the specified host on the
given port number.
The firewall in between might restrict the client access to the
oracle server through the given port number.
So I suggest you to first confirm the oracle host, port and the firewall restriction in between.
you can easily check the access by using telnet as below,
telnet 192.162.2.8 1521
See if the listener and the database are initiated. I just started the listener (lsnrctl start) and the database (sqlplus / as sysdba and startup) and it worked.
I'm newbie in Hbase and Hadoop.
I'm setup Hadoop (1.2.1) and hbase (0.94.27) in pseudo mode in Ubuntu.
I'm also use habse shell to create or insert data to hbase table successfully.
But when I try to write a simple program to insert data to table by using Java API in Eclipse
public class HbaseTest {
public static void main(String[] args) throws Exception {
Configuration conf = HBaseConfiguration.create();
HBaseAdmin admin = new HBaseAdmin(conf);
try {
HTable table = new HTable(conf, "test-table");
Put put = new Put(Bytes.toBytes("test-key"));
put.add(Bytes.toBytes("cf"), Bytes.toBytes("q"), Bytes.toBytes("value"));
table.put(put);
} finally {
admin.close();
}
}
}
, I got this error following:
15/05/30 01:24:20 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=localhost:2181 sessionTimeout=180000 watcher=hconnection0x0
15/05/30 01:24:20 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
15/05/30 01:24:20 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)
15/05/30 01:24:21 WARN zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper exception: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid
15/05/30 01:24:21 INFO util.RetryCounter: Sleeping 2000ms before retry #1...
15/05/30 01:24:22 INFO zookeeper.ClientCnxn: Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
15/05/30 01:24:22 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)
I tried to search similar error but not yet find solution so far.
Do anybody have experience with this problem? Please help me.
In addition, my hbase-site.xml like this
> <configuration> <property>
> <name>hbase.rootdir</name>
> <value>hdfs://localhost:54310/hbase</value>
> </property>
> <property>
> <name>hbase.zookeeper.property.dataDir</name>
> <value>/home/hduser/zookeeper</value>
> <description>Property from ZooKeeper's config zoo.cfg.
> The directory where the snapshot is stored.
> </description>
> </property> </configuration>
my /etc/hosts like this
> 127.0.0.1 localhost
> 127.0.0.1 testuser-VirtualBox
Thanks
Please look here for more references of your error in case you missed it. Happy coding :)