DiskCheck插件显示可用的总空间为0

Question

Jenkins DiskCheck插件显示可用工作空间为0.但驱动器有几个Gb可用空间。 可能有什么不对？

詹金斯：v2.88 DiskCheck插件：v0.3 Slave：Linux Ubuntu 14.03 w / Java8

13:42:15 Disk space threshold is set to :1Gb
13:42:15 Checking disk space Now 
13:42:18 diskspace is 0
13:42:18 Total Disk space in workspace is 0
13:42:18 Total Disk Space Available is: 0Gb
13:42:18  Node Name: myhost
13:42:18 Running Prebuild steps
13:42:18 ERROR: Disk Space is too low please look into it before starting a     build