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1. Re: ERROR ConnectionPool.initConnectionCache: Io exception: The Network Adapter could not establish the connection
andey Mar 21, 2017 7:17 AM (in response to ramya2017)Normally the message indicates either a connectivity failure (e.g. network issues, database is rejecting traffic, etc.) between the machine where JBoss is running and the database server OR a problem with the connection URL.
The exception is raised by the Oracle driver. You may also want to engage your DBA, network administrators and/or contact Oracle Support directly. It is possible that the database server is sometimes rejecting traffic or else that something is sporadically failing in the network.
1#It seems like there is firewall/network issues in your set up.
2#Check that the database is up and running and accessible from the client machine
3#The exception could be caused by a protocol error, network error, bug in the driver, back-end RDBMS error, etc.
4#This is not a JBoss issue, but should be investigated by:
a. network administrators
b. back-end server administrators (in this case Oracle admins)
See [1]
[1]Oracle Network Adapter could not establish the connection tips