Today’s lesson has to do with z-index and events. I’d had a png with transparant portions that I wanted to use as a mask, so that information from underneath would not show. However, buttons, links, and hovers were not working — the top level element was taking the events and eating them. A change of z-index and they started behaving as expected.
30Jul09
z-index and events
29Jul09
JBoss port confusion
We ran into a case where JBoss was unable to come up; it gave the following (partial) exception:
java.rmi.server.ExportException: Port already in use: 1098; nested exception is:
java.net.BindException: Cannot assign requested address
After poking around with netstat and lsof, we couldn’t find anything that was binding to the port. I’d made the assumption that it was bound, totally missing the next line. As it turns out, we were attempting to bind to a vip which, although it existed in DNS, was not defined on the host on which the error occurred. The “cannot assign requested address” was the clue.
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