Stupid Linux Tricks

tcp        0      0 XX.XX.XX.XX:44101         XX.XX.XX.XX:1521          ESTABLISHED 

That is Java's Oracle driver choosing a source port at random, which is what it does all the time. Only this time the port chosen is used by Java's RMI, so a different app was unable to startup, it failed when trying to bind to port 44101. Of course Oracle connections come and go, so with no user action, the problem went away in about 10 minutes

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