Unable to fill pool (no buffer space available)

Question

I\'m using Wildfly 8.2 and fire a series of DB requests when a certain web page is opened. All queries are invoked thru JPA Criteria API, return results as expected - and - none

Answer 1

Do you use openvz? I think this question should be asked on serverfault. It is related to linux configuration. You can read: tcpsndbuf. You should count opened sockets and check condition:

Answer 2

Try adding this Hibernate property:

<property name="hibernate.connection.release_mode">after_transaction</property>

By default, JTA mandates that connection should be released after each statement, which is undesirable for most use cases. Most Drivers don't allow multiplexing a connection over multiple XA transactions anyway.