JBoss ON reports -1 or 0 for some NFS backed File System resource metrics

Issue

• Disk Reads per Minute and Disk Write Bytes per Minute are not collected for NFS file systems
• Disk Queue (fileSystemUsage.diskQueue), Disk Read Bytes (fileSystemUsage.diskReadBytes), Disk Reads (fileSystemUsage.diskReads), Disk Write Bytes (fileSystemUsage.diskWriteBytes), and Disk Writes (fileSystemUsage.diskWrites) always report a metric value of -1
• Disk Writes per Minute (fileSystemUsage.diskWrites), Disk Read Bytes per Minute (fileSystemUsage.diskReadBytes), Disk Reads per Minute (fileSystemUsage.diskReads), and Disk Write Bytes per Minute (fileSystemUsage.diskWriteBytes) always report a metric value of 0