Using Ambari Core Services
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YARN ResourceManager

Metrics to see status of ResourceManagers on the YARN cluster.

Table 1. YARN ResourceManager metrics descriptions
Row Metrics Description
RPC STATS RPC Avg Processing / Queue Time Average time for processing/queuing a RPC call.
RPC Call Queue Length The length of the RPC call queue.
RPC Slow calls Number of slow RPC calls.
MEMORY USAGE Heap Mem Usage Current heap memory usage.
NonHeap Mem Usage Current non-heap memory usage.
GC STATS GC count Accumulated GC count over time.
GcTime Accumulated GC time over time.
LOG ERRORS Log Error / Fatal Number of ERROR/FATAL logs.
AUTHORIZATION & AUTHENTICATION FAILURES RPC Authorization Failures Number of authorization failures.
RPC Authentication Failures Number of authentication failures.