I want to built the zookeeper cluster in three cloud servers (centos 7) but it is desperate that it hasn't started successful yet....
Here is the conf:
zoo1：
clientPort=2181
dataDir=/tmp/zookeeper/data
syncLimit=5
initLimit=10
tickTime=2000
server.1=0.0.0.0:2888:3888
server.2=x.x.x.x:2888:3888
server.3=x.x.x.x:2888:3888
The other two machines had setup the corresponding localhost to 0.0.0.0 respectively, and confirmed that the iptables and firewalld is closed.
Everytime I run 'zkServer.sh start', it prints STARTED, like this:
[root#VM_144_102_centos zookeeper-3.5.2-alpha]# zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /home/iuShu/components/zookeeper/zookeeper-3.5.2-alpha/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
but their state is...
[root#VM_144_102_centos zookeeper-3.5.2-alpha]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /home/iuShu/components/zookeeper/zookeeper-3.5.2-alpha/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Error contacting service. It is probably not running.
I can see the election port 3888 is listening by using 'netstat -tunlp' and also telnet is OK, here is the primary logs:
2017-12-12 22:06:58,914 [myid:3] - WARN [WorkerSender[myid=3]:QuorumCnxManager#459] - Cannot open channel to 2 at election address /x.x.x.x:3888
java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
I'm new to zookeeper. I had tried any ways i could find but it doesn't did the trick, maybe the reason is the cloud servers ? Hope someone can help me, please~~
Related
Problem statement:
I have two Amazon EC2 instances running on same VPC. One ec2 is running web application (a spring mvc java website), while second instance is running mongodb.
I can do ssh from my local machine to both instances as well as to two instances from each other. Also telnet works perfectly fine from each other using private ip.
I also can connect to ec2 mongodb instance from my personal (local) workspace, as necessary rules are created to accept connections from local and web application's ec2 instance.
However, my web application instance cannot connect to this mongodb instance and throwing following exception whenever trying to load index page.
Exception:
com.mongodb.diagnostics.logging.JULLogger log
INFO: Cluster created with settings {hosts=[xxx.xx.xx.xxx:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
com.mongodb.diagnostics.logging.JULLogger log
INFO: Exception in monitor thread while connecting to server xxx.xx.xx.xxx:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
at com.mongodb.connection.SocketStream.open(SocketStream.java:63)
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:115)
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:113)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.ConnectException: Permission denied (connect failed)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:57)
at com.mongodb.connection.SocketStream.open(SocketStream.java:58)
... 3 more
com.mongodb.diagnostics.logging.JULLogger log
INFO: No server chosen by ReadPreferenceServerSelector{readPreference=primary} from cluster description ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, serverDescriptions=[ServerDescription{address=xxx.xx.xx.xxx:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Permission denied (connect failed)}}]}. Waiting for 30000 ms before timing out
Other details:
- Two security group have been created. 1 for Web application 2 Mongodb
- EC2 Web application is running on RHEL + Java 1.8 + Tomcat
- EC2 Mongo instance is running on RHEL (followed instructions from https://docs.mongodb.com/manual/tutorial/install-mongodb-on-red-hat/)
- Java Driver is used to connect to MongoDB is { driver: { name: "mongo-java-driver", version: "3.4.1" }
- bind_ip is set to 0.0.0.0 and no administrative security at this moment.
Assumption:
I am certain that mongodb ec2 instance is accepting connection as i can connect from local workspace.
Any clue or direction in this regards will be really helpful. Thanks.
bind_ip set to 0.0.0.0
Security groups are accepting connections from pretty much everywhere and inbound and outbound 0.0.0.0/0
iptables rules set for INPUT and OUTPUT on both instances.
I wrote a multi-server chat system based on Java under Windows. At the security part, I created one keystore to create the SSLSocket. When I launch 3 servers, it works on Windows(Win10 14393.321) but fails on OS X(Version 10.12 (16A323)) and Linux(Ubuntu 14.04.4 LTS). It really confused me. Here is the keystore part:
System.setProperty("javax.net.ssl.keyStore",keyFilepath);
System.setProperty("javax.net.ssl.trustStore",keyFilepath);
System.setProperty("javax.net.ssl.keyStorePassword","password");
System.setProperty("javax.net.ssl.trustStorePassword", "password");
And when I run the third server on OS X or Linux, it shows:
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method) at
java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at
java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at
java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at
java.net.Socket.connect(Socket.java:589) at
sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:668) at
sun.security.ssl.SSLSocketImpl.(SSLSocketImpl.java:427) at
sun.security.ssl.SSLSocketFactoryImpl.createSocket(SSLSocketFactoryImpl.java:88)
at server.AuthorizeServer.MessageReceive(AuthorizeServer.java:99) at
server.AuthorizeServer.main(AuthorizeServer.java:64) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497) at
org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
This is my first time asking on StackOverflow and I really looking forward to your kind help.
Thanks!
java.net.ConnectException: Connection refused
Connection refused is an error message from the TCP stack and means that it could not connect with TCP to the other side. Since SSL/TLS is a layer on top of TCP and is only started once the TCP connect succeeded it means that the problem is not caused by different behavior at the SSL/TLS layer.
That this is not cause by the SSL layer but the TCP layer can also be seen by the stacktrace: Connection refused at java.net.PlainSocketImpl.socketConnect
More likely is that there is something blocking the TCP connection (firewall) or that you've tried to listen/connect to the wrong IP address (e.g. trying to reach a server listening on 127.0.0.1 on Windows from the Linux system). But is impossible to say from the currently provided information what exactly is the case.
I have deployed storm server, but I am receiving the following error every time I start supervisor.
2014-09-08 09:04:40 o.a.z.ClientCnxn [INFO] Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2014-09-08 09:04:40 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) ~[na:1.7.0_65]
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739) ~[na:1.7.0_65]
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350) ~[zookeeper-3.4.5.jar:3.4.5-1392090]
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068) ~[zookeeper-3.4.5.jar:3.4.5-1392090]
can anyone please help me with the error.
Thanks in advance
Starting Zookeeper was my issue here:
zkServer start
After which you should rerun the topology.
Have you setup Zookeeper? Zookeeper should be up and running before running storm topologies.
In the storm documentation refer to Set up a Zookeeper cluster section.
This exception has one meaning only: nothing was listening at the IP:port you tried to connect to. Either that was wrong or you didn't start the server.
Go to Zookeeper Installation directory.
cd to bin.
Give the command ./zkServer stop in all zookeeper nodes.
Again give the command ./zkServer start in all zookeeper nodes.
Start all the storm processes(Nimbus and Supervisor).
Now you will not get this exception in Zookeeper cluster.
I configured all SSL settings in Weblogic Server Administration Console. SSL port is 7102, I also used demo truststore, keystore, which was installed with OES.
So it doesn't work. When I open https(no urls)site.ru:7102 I get http 404 error.
I check listening ports with netstat on the server and there is not any process which listen port 7102. When I try edit SSL port in Weblogic Server Administration Console nothing happens. I also tried change common "Listen Port" and "Activate Changes" but nothing happens, Weblogic Server still works on old port - 7101.
When I use OES Client config util, which connect with server throw SSL I get this exception:
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:618)
at sun.security.ssl.SSLSocketImpl.<init>(SSLSocketImpl.java:407)
at sun.security.ssl.SSLSocketFactoryImpl.createSocket(SSLSocketFactoryImpl.java:88)
at oracle.security.oes.enroll.EnrollmentClient.enroll(EnrollmentClient.java:135)
at oracle.security.oes.enroll.EnrollmentClient.main(EnrollmentClient.java:478)
at oracle.security.oes.tools.EnrollmentTool.doEnroll(EnrollmentTool.java:103)
at oracle.security.oes.tools.SMConfigTool.doEnrollment(SMConfigTool.java:1192)
at oracle.security.oes.tools.SMConfigTool.run(SMConfigTool.java:617)
at oracle.security.oes.tools.SMConfigTool.main(SMConfigTool.java:546)
Connection refused: connect
Tell me, please, what could be the reason. What should I do to run SSL listening on Weblogic?
Try three options...
Take a backup of config.xml and edit it by placing the ssl port make sure ssl port enabled tag is true
Goto admin console there also change the ssl port as per your requirement what you put in the config.xml
3.Make sure you opened that port in firewall
Goto Run -> wf.msc -> inbound connection -> new rule -> port -> finish
Restart all the nodes (Both admin and managed)
I am trying to connect to cassandra. I installed the latest stable version that is apache-cassandra-1.2.4 and extracted it on my desktop. As I run cassandra it sets up nicely listening for thrift client and displaying following :
sudo cassandra -f
log :
INFO 15:30:34,646 Cassandra version: 1.0.12
INFO 15:30:34,646 Thrift API version: 19.20.0
INFO 15:30:34,646 Loading persisted ring state
INFO 15:30:34,650 Starting up server gossip
INFO 15:30:34,661 Enqueuing flush of Memtable-LocationInfo#1117603949(29/36 serialized/live bytes, 1 ops)
INFO 15:30:34,661 Writing Memtable-LocationInfo#1117603949(29/36 serialized/live bytes, 1 ops)
INFO 15:30:34,877 Completed flushing /var/lib/cassandra/data/system/LocationInfo-hd-54-Data.db (80 bytes)
INFO 15:30:34,892 Starting Messaging Service on port 7000
INFO 15:30:34,901 Using saved token 143186062733850112297005303551620336860
INFO 15:30:34,903 Enqueuing flush of Memtable-LocationInfo#1282534304(53/66 serialized/live bytes, 2 ops)
INFO 15:30:34,904 Writing Memtable-LocationInfo#1282534304(53/66 serialized/live bytes, 2 ops)
INFO 15:30:35,102 Completed flushing /var/lib/cassandra/data/system/LocationInfo-hd-55-Data.db (163 bytes)
INFO 15:30:35,106 Node localhost/127.0.0.1 state jump to normal
INFO 15:30:35,107 Bootstrap/Replace/Move completed! Now serving reads.
INFO 15:30:35,108 Will not load MX4J, mx4j-tools.jar is not in the classpath
INFO 15:30:35,150 Binding thrift service to localhost/127.0.0.1:9160
INFO 15:30:35,155 Using TFastFramedTransport with a max frame size of 15728640 bytes.
INFO 15:30:35,160 Using synchronous/threadpool thrift server on localhost/127.0.0.1 : 9160
INFO 15:30:35,168 Listening for thrift clients...
Now as I run : cassandra-cli -h localhost -p 9160, it throws up the error. I have checked for the port to be free and cassandra is listening at the port. :
**
org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused
at org.apache.thrift.transport.TSocket.open(TSocket.java:183)
at org.apache.thrift.transport.TFramedTransport.open(TFramedTransport.java:81)
at org.apache.cassandra.cli.CliMain.connect(CliMain.java:80)
at org.apache.cassandra.cli.CliMain.main(CliMain.java:256)
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at org.apache.thrift.transport.TSocket.open(TSocket.java:178)
... 3 more
Exception connecting to localhost/9160. Reason: Connection refused.
**
I had the same error.Now, it is OK.
The main problem is that the configuration is wrong.
My configuration is as following:
My visual machine ip is 192.168.11.11.My cassandra was installed into the machine.So, I configurate thar
listen_address: 192.168.11.11
rpc_address: 0.0.0.0
broadcast_rpc_address: 192.168.11.11
That is OK。
The documentation of cassandra-stress seems to be sketchy. Maybe in due course that would be corrected. As of now, this command worked for me
./cassandra-stress write -node <IP_OF_NODE1>
Once this works, we could try putting in the other optional parameters to tweak our command.
Option 1:
Run jps command under root user and kill CassandraDaemon if you will see it. After this you will start Cassandra again.
Option2:
Try to connect Cassandra with CQL
./cqlsh 10.234.31.232 9042
Final Check:
An intermediate firewall is blocking the JVM from making the connection.
An operating system firewall, or antivirus that is causing the problems as well.
I think you installed in windows and looks like firewall is blocking your connection.