I made an app that parses news from NewsAPI and saves them into a MongoDB collection. What I want to do is make the application work even if the Mongo Service is not up (or if the user doesn't have mongo installed.) Here's the code:
try{
// mongo connection methods
// mongo saving files method
}
catch(MongoSocketOpenException e){
System.out.println(e.getMessage());
}
I surrounded the connection with a try-catch, but if the mongo service is not opened, it still doesn't work... because the mongo exceptions are imported only when the service is opened. How do i have to do this? Exception e is not working... MongoSocketOpenException neither... Thanks for the help. Here's the error i receive if the service is closed.
com.mongodb.MongoSocketOpenException: Exception opening socket
at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:70) ~[mongo-java-driver-3.11.0.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:128) ~[mongo-java-driver-3.11.0.jar:na]
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:117) ~[mongo-java-driver-3.11.0.jar:na]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_221]
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_221]
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85) ~[na:1.8.0_221]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_221]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_221]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_221]
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[na:1.8.0_221]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_221]
at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_221]
at com.mongodb.internal.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:64) ~[mongo-java-driver-3.11.0.jar:na]
at com.mongodb.internal.connection.SocketStream.initializeSocket(SocketStream.java:79) ~[mongo-java-driver-3.11.0.jar:na]
at com.mongodb.internal.connection.SocketStream.open(SocketStream.java:65) ~[mongo-java-driver-3.11.0.jar:na]
... 3 common frames omitted
Thanks for the effort. :)
Related
I have one requirement for parsing all email from one of gmail account.
My code is below
Properties properties = new Properties();
properties.put("mail.store.protocol", "pop3");
Session session = Session.getDefaultInstance(properties, null);
session.addProvider(new Provider(Provider.Type.STORE, "gimaps", "com.sun.mail.gimap.GmailSSLStore","Oracle","1.5.4"));
GmailSSLStore store = (GmailSSLStore) session.getStore("gimaps");
store.connect(user, password); <--- ERROR
GmailFolder folder = (GmailFolder) store.getFolder("INBOX");
folder.open(Folder.READ_WRITE);
I have tried many ways by added all required properties mail.smtp.* but still i get below error
com.sun.mail.util.MailConnectException: Couldn't connect to host, port: imap.gmail.com, 993; timeout -1;
nested exception is:
java.net.ConnectException: Connection refused
at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:725)
at com.sun.mail.gimap.GmailStore.protocolConnect(GmailStore.java:92)
at javax.mail.Service.connect(Service.java:366)
at javax.mail.Service.connect(Service.java:246)
at javax.mail.Service.connect(Service.java:267)
at com.rs.utils.ReceiveMail.receiveEmail(ReceiveMail.java:88)
at com.rs.thread.ScheduleMailParsing.parsingMail(ScheduleMailParsing.java:37)
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:498)
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:93)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: 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 java.net.Socket.connect(Socket.java:538)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:331)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:238)
at com.sun.mail.iap.Protocol.<init>(Protocol.java:123)
at com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:126)
at com.sun.mail.gimap.protocol.GmailProtocol.<init>(GmailProtocol.java:106)
at com.sun.mail.gimap.GmailStore.newIMAPProtocol(GmailStore.java:98)
at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:684)
... 20 more
This code is working fine in my local machine but when i deploy war file into tomcat server at that time i got this exception..
my tomcat server is from MOCHAHOST hosting server.
anyone know how to solve this exception?
When I am trying to copy Excel sheet from my local to another windows server. File should be generating automatically at my local for every 3 min, at the time I have to generate in window server. But I got this error below I have mentioned here,
I am using code only you can refer this link: https://vinaydvd.wordpress.com/2013/12/08/copying-files-from-a-remote-linux-server-to-local-windows-server-using-java/
com.jcraft.jsch.JSchException: java.net.ConnectException: Connection refused: connect
at com.jcraft.jsch.Util.createSocket(Util.java:349)
at com.jcraft.jsch.Session.connect(Session.java:215)
at com.jcraft.jsch.Session.connect(Session.java:183)
at com.hpe.cdsh.cadence.GenerateExcel.main(GenerateExcel.java:28)
Caused by: 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:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at java.net.Socket.<init>(Socket.java:434)
at java.net.Socket.<init>(Socket.java:211)
at com.jcraft.jsch.Util.createSocket(Util.java:343)
... 3 more
I have used the following code to start the Java DB server:
System.setProperty("derby.drda.startNetworkServer", "true");
try {
NetworkServerControl serverControl = new NetworkServerControl();
serverControl.start(new PrintWriter(System.out, true));
} catch (Exception e) {
e.printStackTrace();
}
I can connect to the database on the local PC using the URL:
String dbURLTable = "jdbc:derby://localhost:1527/Tables;create=true;user=Gen;password=YZG";
But when I try to connect to it on LAN (Firewall disabled) I use the following URL:
String dbURLTable = "jdbc:derby://192.168.1.105:1527/Tables;create=true;user=Gen;password=YZG";
Yet the other PC cannot connect to this database, what's the problem?
The error I'm getting is:
java.sql.SQLNonTransientConnectionException: java.net.ConnectException : Error connecting to server 192.168.1.106 on port 1,527 with message Connection refused: connect.
at org.apache.derby.client.am.SQLExceptionFactory.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.jdbc.ClientDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:270)
at Admin.CreateTables.CreateT(CreateTables.java:188)
at Admin.CreateTables.run(CreateTables.java:13)
at java.lang.Thread.run(Thread.java:745)
Caused by: ERROR 08001: java.net.ConnectException : Error connecting to server 192.168.1.106 on port 1,527 with message Connection refused: connect.
at org.apache.derby.client.net.NetAgent.<init>(Unknown Source)
at org.apache.derby.client.net.NetConnection.newAgent_(Unknown Source)
at org.apache.derby.client.am.ClientConnection.<init>(Unknown Source)
at org.apache.derby.client.net.NetConnection.<init>(Unknown Source)
at org.apache.derby.client.net.ClientJDBCObjectFactoryImpl.newNetConnection(Unknown Source)
... 6 more
Caused by: 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:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at java.net.Socket.<init>(Socket.java:434)
at java.net.Socket.<init>(Socket.java:211)
at javax.net.DefaultSocketFactory.createSocket(SocketFactory.java:271)
at org.apache.derby.client.net.OpenSocketAction.run(Unknown Source)
at org.apache.derby.client.net.OpenSocketAction.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 11 more
This is happening because you are creating NetworkServerControl by using 0-arg constructor NetworkServerControl() which does not allow remote connections
You have to use NetworkServerControl(InetAddress address, int portNumber) in order to allow remote connections
//accepts connections from other hosts on an IPv4 system
NetworkServerControl serverControl =
new NetworkServerControl(InetAddress.getByName("0.0.0.0"),1527);
For details please see this
SolrIndexer: starting at 2015-10-15 10:13:00
Adding 90 documents:
java.io.IOException: Job failed!
SolrDeleteDuplicates: starting at 2015-10-15 10:13:11
SolrDeleteDuplicates: Solr url: http://localhost:8939/solr/
Exception in thread "main" java.io.IOException: org.apache.solr.client.solrj.SolrServerException: java.net.ConnectException: Connection refused: connect
at org.apache.nutch.indexer.solr.SolrDeleteDuplicates$SolrInputFormat.getSplits(SolrDeleteDuplicates.java:200)
at org.apache.hadoop.mapred.JobClient.writeOldSplits(JobClient.java:810)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:781)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:730)
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1249)
at org.apache.nutch.indexer.solr.SolrDeleteDuplicates.dedup(SolrDeleteDuplicates.java:373)
at org.apache.nutch.indexer.solr.SolrDeleteDuplicates.dedup(SolrDeleteDuplicates.java:353)
at org.apache.nutch.crawl.Crawl.run(Crawl.java:153)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)
Caused by: org.apache.solr.client.solrj.SolrServerException: java.net.ConnectException: Connection refused: connect
at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:478)
at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:244)
at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:89)
at org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:118)
at org.apache.nutch.indexer.solr.SolrDeleteDuplicates$SolrInputFormat.getSplits(SolrDeleteDuplicates.java:198)
... 9 more
Caused by: 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:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at java.net.Socket.<init>(Socket.java:434)
at java.net.Socket.<init>(Socket.java:286)
at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:80)
at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:122)
at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:422)
... 13 more
How to resolve this issue?
Your solr url is not valid. You need to write the core as well. By default the core is collection1. Therefore, in your case the url is http://localhost:8983/solr/collection1
Solr doesn't seem to be running - Connection refused indicates that something is unable to contact whatever it should contact. Your configuration is probably broken, or you haven't started Solr or you're running on a different port.
My JMX client failed to connect to JMX server while I have started to use the JMX authentication.
I use Java 8 and Centos6.
I have configured the following settings:
JAVA_OPTS="${JAVA_OPTS} -Dcom.sun.management.jmxremote.authenticate=true -Dcom.sun.management.jmxremote.password.file=<path to password file> -Dcom.sun.management.jmxremote.access.file=<path to access file>"
Unfortunately my JMX client failed to connect to JMX server with the following exception:
java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
java.net.ConnectException: Connection refused]
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:369)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:270)
at org.apache.catalina.ant.jmx.JMXAccessorTask.createJMXConnection(JMXAccessorTask.java:384)
at org.apache.catalina.ant.jmx.JMXAccessorTask.accessJMXConnection(JMXAccessorTask.java:439)
at org.apache.catalina.ant.jmx.JMXAccessorTask.getJMXConnection(JMXAccessorTask.java:477)
at org.apache.catalina.ant.jmx.JMXAccessorTask.execute(JMXAccessorTask.java:345)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
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.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:435)
at org.apache.tools.ant.Target.performTasks(Target.java:456)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
at org.apache.tools.ant.Main.runBuild(Main.java:851)
at org.apache.tools.ant.Main.startAnt(Main.java:235)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: javax.naming.ServiceUnavailableException [Root exception is java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
java.net.ConnectException: Connection refused]
at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:122)
at com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:205)
at javax.naming.InitialContext.lookup(InitialContext.java:417)
at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1957)
at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1924)
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:287)
... 22 more
Caused by: java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
java.net.ConnectException: Connection refused
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:342)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:118)
... 27 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
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 java.net.Socket.connect(Socket.java:538)
at java.net.Socket.<init>(Socket.java:434)
at java.net.Socket.<init>(Socket.java:211)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 32 more
To solve it I read carefully the documentation:
http://docs.oracle.com/javase/7/docs/technotes/guides/management/agent.html#gdeup
The following comment about the password file is very important:
You must ensure that only the owner has read and write permissions on this file, since it contains the passwords in clear text. For security reasons, the system checks that the file is only readable by the owner and exits with an error if it is not.
I set read permission to a user and my client successfully connects to the JMX server:
chmod 400 <path to password file>