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    If you're not using yet, consider using the SQLServerDataSource to set your server configurations. Also, check if the server is accepting TCP/IP connections and if there's no firewall blocking the connections.

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via Liferay Issues by Rushikesh, 1 year ago
com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.
via liferay.com by Unknown author, 2 years ago
com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.
via liferay.com by Unknown author, 2 years ago
com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.
via Liferay Issues by Rushikesh, 1 year ago
com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.
via liferay.com by Unknown author, 2 years ago
com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.
via Stack Overflow by franco
, 8 months ago
com.microsoft.sqlserver.jdbc.SQLServerException: The connection is closed.	at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:171)	at com.microsoft.sqlserver.jdbc.SQLServerConnection.checkClosed(SQLServerConnection.java:319)	at com.microsoft.sqlserver.jdbc.SQLServerConnection.createStatement(SQLServerConnection.java:1829)	at com.microsoft.sqlserver.jdbc.SQLServerConnection.createStatement(SQLServerConnection.java:1542)	at com.mchange.v2.c3p0.impl.NewProxyConnection.createStatement(NewProxyConnection.java:96)	at sun.reflect.GeneratedMethodAccessor949.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy$LazyConnectionInvocationHandler.invoke(LazyConnectionDataSourceProxy.java:364)	at $Proxy62.createStatement(Unknown Source)	at com.liferay.counter.service.persistence.ConnectionHeartbeatJob.sendHeartbeat(ConnectionHeartbeatJob.java:69)	at com.liferay.counter.service.persistence.ConnectionHeartbeatJob.execute(ConnectionHeartbeatJob.java:51)	at com.liferay.portal.job.JobWrapper.execute(JobWrapper.java:63)	at org.quartz.core.JobRunShell.run(JobRunShell.java:202)	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:529)