How to resolve "TNS-12520 TNS:listener could not find available handler for requested type"?
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by Roman Kagan
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Published on 2010-04-29T19:33:11Z
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2010/04/29
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I have brand new MacBook Pro (Mac OS 10.6.3) and installed Oracle's SQLDeveloper. After doing so, I set the connection and was connecting just fine. But after an hour or so I got "TNS-12520 TNS:listener could not find available handler for requested type". I wonder how can I fix it?
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