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Can't connect to the HANA database in neo.ondemand.com

I have trouble accessing to any HANA database in the product landscape “neo.ondemand.com” via Eclipse -> SAP Hana Administration Console since yesterday (Dec 22, 2014). The following is the error information when connecting to the HANA db:

java.util.concurrent.ExecutionException: com.sap.jpaas.infrastructure.console.exception.CommandException: Failed to connect the tunnel

  at java.util.concurrent.FutureTask.report(Unknown Source)

  at java.util.concurrent.FutureTask.get(Unknown Source)

  at com.sap.ndb.studio.common.CallableUtil.executeCallable(CallableUtil.java:62)

  at com.sap.cloud.tools.eclipse.hana.tunnel.ui.CloudSystemConnectionWizard$1.run(CloudSystemConnectionWizard.java:98)

  at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

Caused by: com.sap.jpaas.infrastructure.console.exception.CommandException: Failed to connect the tunnel

  at com.sap.core.persistence.commands.tunnel.connection.DbTunnelManager.startTunnelClient(DbTunnelManager.java:75)

  at com.sap.core.persistence.commands.tunnel.api.CommandTunnelHandler.openTunnel(CommandTunnelHandler.java:143)

  at com.sap.cloud.tools.eclipse.hana.tunnel.ui.CloudSystemHelper.openTunnel(CloudSystemHelper.java:271)

  at com.sap.cloud.tools.eclipse.hana.tunnel.ui.CloudSystemHelper.addCloudSystem(CloudSystemHelper.java:326)

  at com.sap.cloud.tools.eclipse.hana.tunnel.ui.CloudSystemConnectionWizard$1$1.call(CloudSystemConnectionWizard.java:89)

  at com.sap.cloud.tools.eclipse.hana.tunnel.ui.CloudSystemConnectionWizard$1$1.call(CloudSystemConnectionWizard.java:1)

  at java.util.concurrent.FutureTask.run(Unknown Source)

  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

  at java.lang.Thread.run(Unknown Source)

Caused by: com.sap.core.connectivity.tunnel.api.management.ConnectionFailedException: Unable to establish tunnel connection

  at com.sap.core.connectivity.tunnel.client.management.DirectTunnelOperatorImpl.connect(DirectTunnelOperatorImpl.java:34)

  at com.sap.core.persistence.commands.tunnel.connection.DbTunnelManager.startTunnelClient(DbTunnelManager.java:72)

  ... 9 more

Caused by: java.io.IOException: An existing connection was forcibly closed by the remote host

  at sun.nio.ch.SocketDispatcher.read0(Native Method)

  at sun.nio.ch.SocketDispatcher.read(Unknown Source)

  at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source)

  at sun.nio.ch.IOUtil.read(Unknown Source)

  at sun.nio.ch.SocketChannelImpl.read(Unknown Source)

  at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:64)

  at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)

  at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318)

  at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)

  at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)

  at org.jboss.netty.handler.execution.MemoryAwareThreadPoolExecutor$MemoryAwareRunnable.run(MemoryAwareThreadPoolExecutor.java:622)

  ... 3 more

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