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I am on Linux, CentOS 6 (might be 6.5?) and Java 1.8 My hardware configuration is very generous: Core i7 4770 with 32GB RAM. My Netbeans suddenly started grinding to a halt. Top showed 7-8 cores were utilising 90%+ of CPU. I tried Tools -> Options (I cannot remember the rest of the menu chain) to turn off checking external sources. However, I still had the same issues when the parser ran, so I had to turn off automatic parsing. I **think** this was triggered shortly before I manually selected to reparse the code base. I cannot be certain I did do this, but its a possibility. I was not experiencing these problems for the first few hours of usage, then I **think** I manually instigated a code parse and from then on I had the issues. If the issue wasn't caused by manually selecting to reparse the code, I was building my code, with my project being a "from existing sources". Not sure if this could have caused it though, but I was making around the time of the occurrence (I wasn't building when I saw 7-8 CPU cores @ 90%+ utilisation).
Please attach CPU snapshot of the time when NetBeans was consuming 90% of CPU http://wiki.netbeans.org/FaqProfileMeNow and also attach the messages.log from that time. Thanks.