HADOOP-8027. Visiting /jmx on the daemon web interfaces may print unnecessary error in logs. Contributed by Aaron T. Myers.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1241303 13f79535-47bb-0310-9956-ffa450edef68
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@ -238,11 +238,14 @@ Release 0.23.1 - Unreleased
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HADOOP-8002. SecurityUtil acquired token message should be a debug rather than info.
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(Arpit Gupta via mahadev)
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HADOOP-8009. Create hadoop-client and hadoop-minicluster artifacts for downstream
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projects. (tucu)
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HADOOP-8009. Create hadoop-client and hadoop-minicluster artifacts for downstream
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projects. (tucu)
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HADOOP-7470. Move up to Jackson 1.8.8. (Enis Soztutar via szetszwo)
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HADOOP-8027. Visiting /jmx on the daemon web interfaces may print
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unnecessary error in logs. (atm)
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OPTIMIZATIONS
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BUG FIXES
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@ -34,6 +34,7 @@ import javax.management.MBeanServer;
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import javax.management.MalformedObjectNameException;
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import javax.management.ObjectName;
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import javax.management.ReflectionException;
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import javax.management.RuntimeMBeanException;
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import javax.management.openmbean.CompositeData;
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import javax.management.openmbean.CompositeType;
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import javax.management.openmbean.TabularData;
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@ -308,6 +309,15 @@ public class JMXJsonServlet extends HttpServlet {
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Object value = null;
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try {
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value = mBeanServer.getAttribute(oname, attName);
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} catch (RuntimeMBeanException e) {
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// UnsupportedOperationExceptions happen in the normal course of business,
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// so no need to log them as errors all the time.
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if (e.getCause() instanceof UnsupportedOperationException) {
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LOG.debug("getting attribute "+attName+" of "+oname+" threw an exception", e);
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} else {
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LOG.error("getting attribute "+attName+" of "+oname+" threw an exception", e);
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}
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return;
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} catch (AttributeNotFoundException e) {
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//Ignored the attribute was not found, which should never happen because the bean
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//just told us that it has this attribute, but if this happens just don't output
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