need help with setting up connection from Tableau to a server where R is installed. Installed R and Rserve in linux.Started the Rserve from R console using
library(Rserve)
Rserve()
In Tableau trying to set up connection and then test connection by providing Server name and port as 6311 I get below error
"Connected party did not properly responded after a period of time, or
established connection failed because connected host has failed to
respond"
tried chkconfig iptables off and service iptables stop but no use.
Related
I am trying to set up a reverse ssh tunnel between a local machine behind a router and a machine on the Internet, so that the Internet machine can tunnel back and mount a disk on the local machine.
On the local machine, I type
/usr/bin/ssh -N -f -R *:2222:127.0.0.1:2222 root#ip_of_remote_machine
This causes the remote machine to listen on port 2222. But when I try to mount the sshfs disk on the remote machine, I get "connection refused" on the local machine. Interestingly, port 2222 doesn't show up on the local machine as being bound. However, I'm definitely talking to ssh on the local machine since it complains
debug1: channel 0: connection failed: Connection refused
I have GatewayPort set to Yes on both machines. I also have AllowTcpForwarding yes on both machines as well.
First, the line needs to be
/usr/bin/ssh -N -f -R *:2222:127.0.0.1:22 root#ip_of_remote_machine
Where port 22 represents the ssh server of the local machine.
Second, since I am using sshfs, the following line needs to be in its sshd_config
Subsystem sftp /usr/lib64/misc/sftp-server
Everything was working fine. I could connect to my EC2 instance through SSH. Then I wanted to install let-encrypt. I was following this tutorial to install https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-16-04. During the process of installing lets-encrypt, I install nginx and while trying to enable nginx, I got a message that I might not be able to connect to my instance through SSH anymore. I ignored the message. Now when I try to connect to my instance though SSH, I get error
connection timed out
I'm trying to import data from an SQL Server to my HIVE and I get the following error:
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection
to the host ip address databaseName=SherLock2, port 1433 has
failed. Error: "null. Verify the connection properties, check that an
instance of SQL Server is running on the host and accepting TCP/IP
connections at the port, and that no firewall is blocking TCP
connections to the port.".
This is the command I'm trying to run:
sqoop import --table Sms --target-dir SherlockData/Sms --username yogevmet --password password --connect "jdbc:sqlserver://ipadress databaseName=SherLock2" --split-by UUID --hive-import -hive-table SherLock_2.sms --driver com.microsoft.sqlserver.jdbc.SQLServerDriver;
I looked up here: JDBC connection failed, error: TCP/IP connection to host failed
And everything is set as it suppose to be, does someone have any other suggestion?
Thanks
I'm trying to do load test postgresql db using tsung.
I used pgsql.xml provided in examples folder in tsung-1.5.0.
Here's my pgsql.xml: https://github.com/processone/tsung/blob/master/examples/pgsql.xml.in
I run tsung using tsung -f test.xml -p pgsql start.
I got the following error:
ssh: connect to host localhost port 22: Connection refused
Could anyone point me out what the problem is and how to solve it?
You are using server monitoring and your SSH is not setup..
<monitoring>
<monitor host="localhost"/>
</monitoring>
Do you really want to monitor server? If not then you can comment the code and it should work fine.. If yes then you will have to set up a password less SSH to your server...
I have a webapplication in Asp.net connecting to a separate database-server running CentOS with PostgreSQL. This setup works fine.
To increase performance on the database-server I'm trying to install and confgure PgPool-II for pooling database-connections on the CentOS server.
After the configuration I can connect to PostgreSQL with the pgpool configured port from the CentOS command line, so I assume pgpool is up and running.
When I try to connect from my webapplication to the database-server with my new pgpool port I get the following NpgdslException in the eventlog:
Failed to establish a connection to '[ip-address of db-server]'
Some configuration files:
pgpool.conf:
listen_address = '*'
port = 6432
pcp_port = 9898
enable_pool_hba = true
socket_dir = '/tmp'
pcp_socket_dir = '/tmp'
backend_hostname = ''
backend_port = 5432
num_init_children = 50
max_pool = 4
connection_life_time = 120
client_idle_limit = 0
debug_level = 0
pool_hba.conf:
# TYPE DATABASE USER CIDR-ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all trust
# IPv4 local connections:
host all all 127.0.0.1/32 trust
# Network access
host all all 192.168.0.0/24 md5
I have all the ports open in my CentOS firewall configured in /etc/sysconfig/iptables.
So when I'm connecting to port 5432 in my webapplication everything is fine, but when I change the port to 6432, the port for pgpool) then I get the mentioned exception.
Can anybody help me?
The first thing to do is to make sure that pgpool is running on the right port. This can be done easily using fuser:
fuser -n tcp 6432
If it doesn't return anything nothing is listening on your port. In that case make sure pgpool is running:
ps -A | grep pgpool
If this only shows your grep, then your pgpool has not been started. Please refer to your rpm information for information on how to start it. This may involve chkconfig and system