Connecting to Node Manager Fails with Error, "Cannot Connect To Node Manager: No Buffer Space Available"

 

Node Manager fails error.

Cannot connect to node manager. No buffer space available (Maximum transaction reached?).
 java.net.SocketException: No buffer space available (maximum connections reached?)

Connecting to Node Manager Fails with Error, "Cannot Connect To Node Manager: No Buffer Space Available" 

SOLUTION

This is a Windows OS level issue not at application server level.
Add the registry key hkey_local_machine\system\CurrentControlSet\Service\Tcpip\Parameter\MaxUserPort (val type dword) to value 65534

MaxUserPort is typically going to limit the number of outbound sockets/connections that can be created.

No buffer space available (maximum connections reached?)" Exception While Activating Changes on WLS Console on Windows Server 

An IOException occurred while reading input; nested exception is: java.net.SocketException: No buffer space available (maximum connections reached?): connect; nested exception is: java.net.SocketException: No buffer space available (maximum connections reached?)

SOLUTION

The Windows Server on which this issue is noticed is either to be patched or rebooted to solve this issue.   Please contact your Microsoft Server Admin.