I am getting below error: when i am trying to start hadoop cluster
kishan#kishan-VirtualBox:/usr/local/hadoop/etc/hadoop$ start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.hadoop.security.authentication.util.KerberosUtil (file:/usr/local/hadoop/share/hadoop/common/lib/hadoop-auth-2.9.1.jar) to method sun.security.krb5.Config.getInstance()
WARNING: Please consider reporting this to the maintainers of org.apache.hadoop.security.authentication.util.KerberosUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Starting namenodes on [localhost]
localhost: ssh: connect to host localhost port 22: Connection refused
localhost: ssh: connect to host localhost port 22: Connection refused
Starting secondary namenodes [0.0.0.0]
0.0.0.0: ssh: connect to host 0.0.0.0 port 22: Connection refused
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.hadoop.security.authentication.util.KerberosUtil (file:/usr/local/hadoop/share/hadoop/common/lib/hadoop-auth-2.9.1.jar) to method sun.security.krb5.Config.getInstance()
WARNING: Please consider reporting this to the maintainers of org.apache.hadoop.security.authentication.util.KerberosUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
starting yarn daemons
starting resourcemanager, logging to /usr/local/hadoop/logs/yarn-kishan-resourcemanager-kishan-VirtualBox.out
localhost: ssh: connect to host localhost port 22: Connection refused
Related
I installed Hadoop == '3.3.4' in UBUNTU VERSION="20.04.4 LTS (Focal Fossa)".
After installation and formatting the namenode i worte the following command
samar#pc:~/hadoop-3.3.4/sbin$ ./start-all.sh
But it gave the output as:
Starting namenodes on [localhost]
localhost: ssh: connect to host localhost port 22: Connection refused
Starting datanodes
localhost: ssh: connect to host localhost port 22: Connection refused
Starting secondary namenodes [pc]
pc: ssh: connect to host pc port 22: Connection refused
2022-08-25 13:22:46,349 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting resourcemanager
Starting nodemanagers
localhost: ssh: connect to host localhost port 22: Connection refused
ssh connection output is:
I use a VMware virtualization system. I have centos release 7 as my operating system. I installed hadoop2.7.1. After installing Hadoop I ran the command :#hdfs namenode -format, it ran successfully. But when I run the command :#./start-all.sh it gives me errors. I tried several proposals that I saw on the internet but the problem persists
[root#MASTER sbin]# ./start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
21/06/17 19:06:27 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [MASTER]
root#master's password:
MASTER: starting namenode, logging to /usr/local/hadoop/logs/hadoop-root-namenode-MASTER.out
localhost: ssh: connect to host localhost port 22: Connection refused
Starting secondary namenodes [0.0.0.0]
0.0.0.0: ssh: connect to host 0.0.0.0 port 22: Connection refused
21/06/17 19:06:49 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
starting yarn daemons
starting resourcemanager, logging to /usr/local/hadoop/logs/yarn-root-resourcemanager-MASTER.out
localhost: ssh: connect to host localhost port 22: Connection refused
Provide ssh-key less access to all your worker nodes in hosts file, even localhost. Read instruction in the Tutorial of How To Set Up SSH Keys on CentOS 7.
At last test access without password by ssh localhost and ssh [yourworkernode].
Also, run start-dfs.sh and if was successful run start-yarn.sh.
I meet some problems in the configuration of Hadoop3.2.1 for YARN learning. And I found that there are two different conditions in user root and user host1 when I run the sbin/start-all.sh. Can you tell me how to solve it and whether it has connection with the SSH? Thank you very much.
In Root:
root#host1-virtual-machine:/home/host1/usr/hadoop-3.2.1# sbin/start-all.sh
Starting namenodes on [localhost]
ERROR: Attempting to operate on hdfs namenode as root
ERROR: but there is no HDFS_NAMENODE_USER defined. Aborting operation.
Starting datanodes
ERROR: Attempting to operate on hdfs datanode as root
ERROR: but there is no HDFS_DATANODE_USER defined. Aborting operation.
Starting secondary namenodes [host1-virtual-machine]
ERROR: Attempting to operate on hdfs secondarynamenode as root
ERROR: but there is no HDFS_SECONDARYNAMENODE_USER defined. Aborting operation.
2020-02-12 14:40:27,093 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting resourcemanager
ERROR: Attempting to operate on yarn resourcemanager as root
ERROR: but there is no YARN_RESOURCEMANAGER_USER defined. Aborting operation.
Starting nodemanagers
ERROR: Attempting to operate on yarn nodemanager as root
ERROR: but there is no YARN_NODEMANAGER_USER defined. Aborting operation.
In host1 user:
host1#host1-virtual-machine:~/usr/hadoop-3.2.1$ sbin/start-all.sh
WARNING: Attempting to start all Apache Hadoop daemons as host1 in 10 seconds.
WARNING: This is not a recommended production deployment configuration.
WARNING: Use CTRL-C to abort.
Starting namenodes on [localhost]
localhost: host1#localhost: Permission denied (publickey,password).
Starting datanodes
localhost: host1#localhost: Permission denied (publickey,password).
Starting secondary namenodes [host1-virtual-machine]
host1-virtual-machine: host1#host1-virtual-machine: Permission denied (publickey,password).
Starting resourcemanager
Starting nodemanagers
localhost: host1#localhost: Permission denied (publickey,password).
You need to set up passwordless connection between nodes. This link might help
http://mynotesonhadoop.blogspot.com/2017/07/configuring-passwordless-ssh-from.html?m=1
when i have run bin/hdfs namenode -format,i want to run sudo sbin/start-dfs.sh,but it throw a error that root account is not found.
Starting namenodes on [localhost]
ERROR: Refusing to run as root: root account is not found. Aborting.
Starting datanodes
ERROR: Refusing to run as root: root account is not found. Aborting.
Starting secondary namenodes [bogon]
上一次登录：日 9月 23 14:57:26 CST 2018pts/0 上
bogon: ssh: connect to host bogon port 22: Connection timed out
I am attempting to install Hadoop 2.8.2 with Java 8 on Mac OS, but i ran into this error after typing the hstart command in terminal. (I initially had Java 9 installed, but switched to Java 8 becuase i thought that Java 9 was causing the issue, but the warning still remains.
WARNING: An illegal reflective access operation has occurred WARNING:
Illegal reflective access by
org.apache.hadoop.security.authentication.util.KerberosUtil
(file:/usr/local/Cellar/hadoop/2.8.2/libexec/share/hadoop/common/lib/hadoop-auth-2.8.2.jar)
to method sun.security.krb5.Config.getInstance() WARNING: Please
consider reporting this to the maintainers of
org.apache.hadoop.security.authentication.util.KerberosUtil WARNING:
Use --illegal-access=warn to enable warnings of further illegal
reflective access operations WARNING: All illegal access operations
will be denied in a future release 18/02/04 23:38:54 WARN
util.NativeCodeLoader: Unable to load native-hadoop library for your
platform... using builtin-java classes where applicable Starting
namenodes on [localhost] localhost: namenode running as process 34039.
Stop it first. localhost: datanode running as process 34125. Stop it
first. Starting secondary namenodes [0.0.0.0] The authenticity of host
'0.0.0.0 (0.0.0.0)' can't be established.
This is in my "/usr/local/Cellar/hadoop/2.8.2/libexec/etc/hadoop/hadoop-env.sh" file:
export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true -Djava.security.krb5.realm= -Djava.security.krb5.kdc="