"java.net.SocketException: Connection reset" from IBM DB2 Driver in JBoss EAP

Issue

What does "java.net.SocketException: Connection reset" from IBM DB2 JDBC driver mean?

Caused by: com.ibm.db2.jcc.am.DisconnectNonTransientConnectionException: [jcc][t4][2030][11211][4.26.14] A communication error occurred during operations on the connection's underlying socket, socket input stream,
or socket output stream.  Error location: Reply.fill() - socketInputStream.read (-1).  Message: Connection reset. ERRORCODE=-4499, SQLSTATE=08001
        at com.ibm.db2.jcc.am.b7.a(b7.java:338)
        at com.ibm.db2.jcc.t4.a.a(a.java:572)
        at com.ibm.db2.jcc.t4.a.a(a.java:556)
        at com.ibm.db2.jcc.t4.a.a(a.java:551)
        at com.ibm.db2.jcc.t4.a.b(a.java:1676)
        at com.ibm.db2.jcc.t4.a.a(a.java:1696)
        at com.ibm.db2.jcc.t4.y.b(y.java:271)
        at com.ibm.db2.jcc.t4.y.c(y.java:337)
        at com.ibm.db2.jcc.t4.y.c(y.java:450)
        at com.ibm.db2.jcc.t4.y.v(y.java:1219)
        at com.ibm.db2.jcc.t4.z.a(z.java:53)
        at com.ibm.db2.jcc.t4.b.c(b.java:1426)
        at com.ibm.db2.jcc.t4.b.b(b.java:1298)
        at com.ibm.db2.jcc.t4.b.b(b.java:849)
        at com.ibm.db2.jcc.t4.b.a(b.java:820)
        at com.ibm.db2.jcc.t4.b.a(b.java:441)
        at com.ibm.db2.jcc.t4.b.a(b.java:414)
        at com.ibm.db2.jcc.t4.b.<init>(b.java:352)
        at com.ibm.db2.jcc.DB2SimpleDataSource.getConnection(DB2SimpleDataSource.java:233)
        at com.ibm.db2.jcc.DB2SimpleDataSource.getConnection(DB2SimpleDataSource.java:200)
        at com.ibm.db2.jcc.DB2Driver.connect(DB2Driver.java:471)
        at com.ibm.db2.jcc.DB2Driver.connect(DB2Driver.java:113)
        at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:335)
        ... 14 more
Caused by: java.net.SocketException: Connection reset
        at java.net.SocketInputStream.read(SocketInputStream.java:210)
        at java.net.SocketInputStream.read(SocketInputStream.java:141)
        at com.ibm.db2.jcc.t4.y.b(y.java:225)
        ... 30 more