synchronize sigar invoker
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				@ -41,7 +41,7 @@ public class SigarProcess implements SigarProcessMBean {
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    public void close() {
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    }
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    private Long getLongValue(SigarInvokerJMX invoker, String attr) {
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    private synchronized Long getLongValue(SigarInvokerJMX invoker, String attr) {
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        try {
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            return (Long)invoker.invoke(attr);
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        } catch (SigarException e) {
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