Meter Recieves the RPC call from the Plugin Manager

[vagrant@centos-6-6 ~]$ sudo strace -p 24698 -e trace=read -s 1024 | more
Process 24698 attached
read(20, "{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_FIELDDATA_MEMORY_SIZE\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_PRIMARY_SHARDS\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_COMPLETION_SIZE\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_STATUS\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":1.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_FILTER_CACHE_EVICTIONS\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_DOCUMENT_COUNT\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"v", 1024) = 1024
read(20, "alue\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_STORE_SIZE\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_ID_CACHE_MEMORY_SIZE\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_FIELDDATA_EVICTIONS\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_FILTER_CACHE_MEMORY_SIZE\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_INDEX_COUNT\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_SEGMENT_COUNT\",\"hostname\":\"TEST_ELASTIC", 1024) = 1024
read(20, "SEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_TOTAL_SHARDS\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":0.000000}}{\"jsonrpc\":\"2.0\",\"method\":\"metric\",\"params\":{\"plugin\":\"elasticsearch\",\"metric\":\"ELASTIC_SEARCH_NODE_COUNT\",\"hostname\":\"TEST_ELASTICSEARCH_CENTOS_6_6\",\"value\":1.000000}}", 1024) = 375
read(20, 0x7fff79e5f850, 1024)          = -1 EAGAIN (Resource temporarily unavailable)