[Hadoop Wiki] Update of "ConnectionRefused" by SteveLoughran
Dear Wiki user, You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification. The "ConnectionRefused" page has been changed by SteveLoughran: https://wiki.apache.org/hadoop/ConnectionRefused?action=diff=16=17 Comment: fix name 1. If you are using a Hadoop-based product from a third party, -please use the support channels provided by the vendor. 1. Please do not file bug reports related to your problem, as they will be closed as [[http://wiki.apache.org/hadoop/InvalidJiraIssues|Invalid]] - See also [[http://serverfault.com/questions/725262/what-causes-the-connection-refused-message|Stack Overflow]] + See also [[http://serverfault.com/questions/725262/what-causes-the-connection-refused-message|Server Overflow]] None of these are Hadoop problems, they are hadoop, host, network and firewall configuration issues. As it is your cluster, [[YourNetworkYourProblem|only you can find out and track down the problem.]] - To unsubscribe, e-mail: common-commits-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-commits-h...@hadoop.apache.org
[Hadoop Wiki] Update of "ConnectionRefused" by SteveLoughran
Dear Wiki user, You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification. The "ConnectionRefused" page has been changed by SteveLoughran: https://wiki.apache.org/hadoop/ConnectionRefused?action=diff=15=16 Comment: ref to stack overflow 1. If you are using a Hadoop-based product from a third party, -please use the support channels provided by the vendor. 1. Please do not file bug reports related to your problem, as they will be closed as [[http://wiki.apache.org/hadoop/InvalidJiraIssues|Invalid]] - None of these are Hadoop problems, they are host, network and firewall configuration issues. As it is your cluster, [[YourNetworkYourProblem|only you can find out and track down the problem.]] + See also [[http://serverfault.com/questions/725262/what-causes-the-connection-refused-message|Stack Overflow]] + None of these are Hadoop problems, they are hadoop, host, network and firewall configuration issues. As it is your cluster, [[YourNetworkYourProblem|only you can find out and track down the problem.]] + - To unsubscribe, e-mail: common-commits-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-commits-h...@hadoop.apache.org
[Hadoop Wiki] Update of "ConnectionRefused" by SteveLoughran
Dear Wiki user, You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification. The "ConnectionRefused" page has been changed by SteveLoughran: https://wiki.apache.org/hadoop/ConnectionRefused?action=diff=13=14 Comment: link to ambari port list If the application or cluster is not working, and this message appears in the log, then it is more serious. + The exception text declares both the hostname and the port to which the connection failed. The port can be used to identify the service. For example, port 9000 is the HDFS port. Consult the [[https://ambari.apache.org/1.2.5/installing-hadoop-using-ambari/content/reference_chap2.html|Ambari port reference]], and/or those of the supplier of your Hadoop management tools. + 1. Check the hostname the client using is correct. If it's in a Hadoop configuration option: examine it carefully, try doing an ping by hand. 1. Check the IP address the client is trying to talk to for the hostname is correct. + 1. Make sure the destination address in the exception isn't 0.0.0.0 -this means that you haven't actually configured the client with the real address for that service, and instead it is picking up the server-side property telling it to listen on every port for connections. - 1. Make sure the destination address in the exception isn't 0.0.0.0 -this means that you haven't actually configured the client with the real address for that. - service, and instead it is picking up the server-side property telling it to listen on every port for connections. 1. If the error message says the remote service is on "127.0.0.1" or "localhost" that means the configuration file is telling the client that the service is on the local server. If your client is trying to talk to a remote system, then your configuration is broken. 1. Check that there isn't an entry for your hostname mapped to 127.0.0.1 or 127.0.1.1 in /etc/hosts (Ubuntu is notorious for this). 1. Check the port the client is trying to talk to using matches that the server is offering a service on. - To unsubscribe, e-mail: common-commits-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-commits-h...@hadoop.apache.org
[Hadoop Wiki] Update of "ConnectionRefused" by SteveLoughran
Dear Wiki user,
You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change
notification.
The "ConnectionRefused" page has been changed by SteveLoughran:
https://wiki.apache.org/hadoop/ConnectionRefused?action=diff=12=13
Comment:
subdomains
If the application or cluster is not working, and this message appears in the
log, then it is more serious.
- 1. Check the hostname the client using is correct. If it's in a Hadoop
configuration option: examine it carefully, try doing an ping by hand
+ 1. Check the hostname the client using is correct. If it's in a Hadoop
configuration option: examine it carefully, try doing an ping by hand.
1. Check the IP address the client is trying to talk to for the hostname is
correct.
- 1. Make sure the destination address in the exception isn't 0.0.0.0 -this
means that you haven't actually configured the client with the real address for
that
+ 1. Make sure the destination address in the exception isn't 0.0.0.0 -this
means that you haven't actually configured the client with the real address for
that.
service, and instead it is picking up the server-side property telling it to
listen on every port for connections.
1. If the error message says the remote service is on "127.0.0.1" or
"localhost" that means the configuration file is telling the client that the
service is on the local server. If your client is trying to talk to a remote
system, then your configuration is broken.
- 1. Check that there isn't an entry for your hostname mapped to 127.0.0.1 or
127.0.1.1 in /etc/hosts (Ubuntu is notorious for this)
+ 1. Check that there isn't an entry for your hostname mapped to 127.0.0.1 or
127.0.1.1 in /etc/hosts (Ubuntu is notorious for this).
1. Check the port the client is trying to talk to using matches that the
server is offering a service on.
1. On the server, try a {{{telnet localhost }}} to see if the port is
open there.
1. On the client, try a {{{telnet }}} to see if the port is
accessible remotely.
1. Try connecting to the server/port from a different machine, to see if it
just the single client misbehaving.
+ 1. If your client and the server are in different subdomains, it may be that
the configuration of the service is only publishing the basic hostname, rather
than the Fully Qualified Domain Name. The client in the different subdomain can
be unintentionally attempt to bind to a host in the local subdomain —and
failing.
1. If you are using a Hadoop-based product from a third party, -please use
the support channels provided by the vendor.
1. Please do not file bug reports related to your problem, as they will be
closed as [[http://wiki.apache.org/hadoop/InvalidJiraIssues|Invalid]]
[Hadoop Wiki] Update of "ConnectionRefused" by SteveLoughran
Dear Wiki user,
You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change
notification.
The "ConnectionRefused" page has been changed by SteveLoughran:
https://wiki.apache.org/hadoop/ConnectionRefused?action=diff=11=12
Comment:
cut out list of suppliers of hadoop-based data stacks, as there are too few of
them now
1. On the server, try a {{{telnet localhost }}} to see if the port is
open there.
1. On the client, try a {{{telnet }}} to see if the port is
accessible remotely.
1. Try connecting to the server/port from a different machine, to see if it
just the single client misbehaving.
- 1. If you are using a Hadoop-based product from a third party, including
those from Cloudera, Hortonworks, Intel, EMC and others -please use the support
channels provided by the vendor.
+ 1. If you are using a Hadoop-based product from a third party, -please use
the support channels provided by the vendor.
1. Please do not file bug reports related to your problem, as they will be
closed as [[http://wiki.apache.org/hadoop/InvalidJiraIssues|Invalid]]
None of these are Hadoop problems, they are host, network and firewall
configuration issues. As it is your cluster, [[YourNetworkYourProblem|only you
can find out and track down the problem.]]
[Hadoop Wiki] Update of "ConnectionRefused" by SteveLoughran
Dear Wiki user,
You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change
notification.
The "ConnectionRefused" page has been changed by SteveLoughran:
https://wiki.apache.org/hadoop/ConnectionRefused?action=diff=9=10
Comment:
call out localhost:8020
1. Check the IP address the client is trying to talk to for the hostname is
correct.
1. Make sure the destination address in the exception isn't 0.0.0.0 -this
means that you haven't actually configured the client with the real address for
that
service, and instead it is picking up the server-side property telling it to
listen on every port for connections.
+ 1. If the error message says the remote service is on "127.0.0.1" or
"localhost" that means the configuration file is telling the client that the
service is on the local server. If your client is trying to talk to a remote
system, then your configuration is broken.
1. Check that there isn't an entry for your hostname mapped to 127.0.0.1 or
127.0.1.1 in /etc/hosts (Ubuntu is notorious for this)
1. Check the port the client is trying to talk to using matches that the
server is offering a service on.
1. On the server, try a {{{telnet localhost }}} to see if the port is
open there.
[Hadoop Wiki] Update of ConnectionRefused by SteveLoughran
Dear Wiki user,
You have subscribed to a wiki page or wiki category on Hadoop Wiki for change
notification.
The ConnectionRefused page has been changed by SteveLoughran:
https://wiki.apache.org/hadoop/ConnectionRefused?action=diffrev1=8rev2=9
Comment:
call out 0.0.0.0 as a special case
If the application or cluster is not working, and this message appears in the
log, then it is more serious.
1. Check the hostname the client using is correct
- 1. Check the IP address the client gets for the hostname is correct.
+ 1. Check the IP address the client is trying to talk to for the hostname is
correct.
+ 1. Make sure the destination address in the exception isn't 0.0.0.0 -this
means that you haven't actually configured the client with the real address for
that
+ service, and instead it is picking up the server-side property telling it to
listen on every port for connections.
1. Check that there isn't an entry for your hostname mapped to 127.0.0.1 or
127.0.1.1 in /etc/hosts (Ubuntu is notorious for this)
- 1. Check the port the client is using matches that the server is offering a
service on.
+ 1. Check the port the client is trying to talk to using matches that the
server is offering a service on.
1. On the server, try a {{{telnet localhost port}}} to see if the port is
open there.
1. On the client, try a {{{telnet server port}}} to see if the port is
accessible remotely.
1. Try connecting to the server/port from a different machine, to see if it
just the single client misbehaving.
[Hadoop Wiki] Update of ConnectionRefused by SteveLoughran
Dear Wiki user, You have subscribed to a wiki page or wiki category on Hadoop Wiki for change notification. The ConnectionRefused page has been changed by SteveLoughran: https://wiki.apache.org/hadoop/ConnectionRefused?action=diffrev1=7rev2=8 Comment: your network your problem link 1. If you are using a Hadoop-based product from a third party, including those from Cloudera, Hortonworks, Intel, EMC and others -please use the support channels provided by the vendor. 1. Please do not file bug reports related to your problem, as they will be closed as [[http://wiki.apache.org/hadoop/InvalidJiraIssues|Invalid]] - None of these are Hadoop problems, they are host, network and firewall configuration issues. As it is your cluster, only you can find out and track down the problem. + None of these are Hadoop problems, they are host, network and firewall configuration issues. As it is your cluster, [[YourNetworkYourProblem|only you can find out and track down the problem.]]
[Hadoop Wiki] Update of ConnectionRefused by SteveLoughran
Dear Wiki user,
You have subscribed to a wiki page or wiki category on Hadoop Wiki for change
notification.
The ConnectionRefused page has been changed by SteveLoughran:
http://wiki.apache.org/hadoop/ConnectionRefused?action=diffrev1=3rev2=4
Comment:
mention 127.0.0.1
Unless there is a configuration error at either end, a common cause for this
is the Hadoop service isn't running.
1. Check the hostname the client using is correct
1. Check the IP address the client gets for the hostname is correct.
+ 1. Check that there isn't an entry for your hostname mapped to 127.0.0.1 or
127.0.1.1 in /etc/hosts (Ubuntu is notorious for this)
1. Check the port the client is using matches that the server is offering a
service on.
1. On the server, try a {{{telnet localhost port}}} to see if the port is
open there.
1. On the client, try a {{{telnet server port}}} to see if the port is
accessible remotely.
