The plugins on RHEL 7.2 with ElasticSearch 2.2.0 works fine with "munin-run" from commandline, but not within the "munin-node" deamon

[srecebov]

The plugins on RHEL 7.2 with ElasticSearch 2.2.0 works fine with "munin-run" from commandline (1), but not within the "munin-node" deamon (2).

(1)========================================

**$for i in elastic*; do sudo munin-run $i; done**
filter_size.value 0
field_size.value 1810111592
relocating_shards.value 0
active_shards.value 86
active_primary_shards.value 86
delayed_unassigned_shards.value 0
initializing_shards.value 0
unassigned_shards.value 86
num_docs.value 1625779043
young.value 22449394
old.value 93028
index_size.value 326320956997
search.value 2239097
index.value 4671004712
delete.value 0
get.value 1201318
heap_used.value 14076187952
heap_max.value 33198768128
non_heap_used.value 136132720
heap_committed.value 33198768128
non_heap_committed.value 138285056
young_used.value 99639656
old_used.value 13954949032
old_peak.value 25439922600
young_peak.value 697958400
survivor_used.value 21599264
survivor_peak.value 87228416
count.value 167
peak_count.value 193

(2)========================================

**$cat /var/log/munin-node/munin-node.log**
2016/03/22-18:13:35 Munin::Node::Server (type Net::Server::Fork) starting! pid(13540)
Resolved [*]:4949 to [0.0.0.0]:4949, IPv4
Binding to TCP port 4949 on host 0.0.0.0 with IPv4
Setting gid to "0 0"
2016/03/22-18:13:35 [13540] Error output from elasticsearch_docs:
2016/03/22-18:13:35 [13540]     500 for http://localhost:9200/_nodes at /etc/munin/plugins/elasticsearch_docs line 49.
2016/03/22-18:13:35 [13540]             main::get_json_from_url('http://localhost:9200/_nodes') called at /etc/munin/plugins/elasticsearch_docs line 55
2016/03/22-18:13:35 [13540] Service 'elasticsearch_docs' exited with status 13/0.
2016/03/22-18:13:35 [13540] Error output from elasticsearch_index_total:
2016/03/22-18:13:35 [13540]     500 for http://localhost:9200/_nodes at /etc/munin/plugins/elasticsearch_index_total line 48.
2016/03/22-18:13:35 [13540]             main::get_json_from_url('http://localhost:9200/_nodes') called at /etc/munin/plugins/elasticsearch_index_total line 54
2016/03/22-18:13:35 [13540] Service 'elasticsearch_index_total' exited with status 13/0.
2016/03/22-18:13:36 [13540] Error output from elasticsearch_jvm_threads:
2016/03/22-18:13:36 [13540]     500 for http://localhost:9200/_nodes?jvm=true at /etc/munin/plugins/elasticsearch_jvm_threads line 49.
2016/03/22-18:13:36 [13540]             main::get_json_from_url('http://localhost:9200/_nodes?jvm=true') called at /etc/munin/plugins/elasticsearch_jvm_threads line 55
2016/03/22-18:13:36 [13540] Service 'elasticsearch_jvm_threads' exited with status 13/0.
2016/03/22-18:13:36 [13540] Error output from elasticsearch_jvm_memory:
2016/03/22-18:13:36 [13540]     500 for http://localhost:9200/_nodes/_local/stats/jvm at /etc/munin/plugins/elasticsearch_jvm_memory line 49.
2016/03/22-18:13:36 [13540]             main::get_json_from_url('http://localhost:9200/_nodes/_local/stats/jvm') called at /etc/munin/plugins/elasticsearch_jvm_memory line 55
2016/03/22-18:13:36 [13540] Service 'elasticsearch_jvm_memory' exited with status 13/0.
2016/03/22-18:13:36 [13540] Error output from elasticsearch_jvm_pools_size:
2016/03/22-18:13:36 [13540]     500 for http://localhost:9200/_nodes?jvm=true at /etc/munin/plugins/elasticsearch_jvm_pools_size line 49.
2016/03/22-18:13:36 [13540]             main::get_json_from_url('http://localhost:9200/_nodes?jvm=true') called at /etc/munin/plugins/elasticsearch_jvm_pools_size line 55
2016/03/22-18:13:36 [13540] Service 'elasticsearch_jvm_pools_size' exited with status 13/0.
2016/03/22-18:13:37 [13540] Error output from elasticsearch_cluster_shards:
2016/03/22-18:13:37 [13540]     500 for http://localhost:9200/_cluster/health at /etc/munin/plugins/elasticsearch_cluster_shards line 49.
2016/03/22-18:13:37 [13540]             main::get_json_from_url('http://localhost:9200/_cluster/health') called at /etc/munin/plugins/elasticsearch_cluster_shards line 55
2016/03/22-18:13:37 [13540] Service 'elasticsearch_cluster_shards' exited with status 13/0.
2016/03/22-18:13:37 [13540] Error output from elasticsearch_cache:
2016/03/22-18:13:37 [13540]     500 for http://localhost:9200/_nodes at /etc/munin/plugins/elasticsearch_cache line 49.
2016/03/22-18:13:37 [13540]             main::get_json_from_url('http://localhost:9200/_nodes') called at /etc/munin/plugins/elasticsearch_cache line 55
2016/03/22-18:13:37 [13540] Service 'elasticsearch_cache' exited with status 13/0.
2016/03/22-18:13:37 [13540] Error output from elasticsearch_index_size:
2016/03/22-18:13:37 [13540]     500 for http://localhost:9200/_nodes at /etc/munin/plugins/elasticsearch_index_size line 49.
2016/03/22-18:13:37 [13540]             main::get_json_from_url('http://localhost:9200/_nodes') called at /etc/munin/plugins/elasticsearch_index_size line 55
2016/03/22-18:13:37 [13540] Service 'elasticsearch_index_size' exited with status 13/0.
2016/03/22-18:13:37 [13540] Error output from elasticsearch_gc_time:
2016/03/22-18:13:37 [13540]     500 for http://localhost:9200/_nodes/_local/stats/jvm at /etc/munin/plugins/elasticsearch_gc_time line 49.
2016/03/22-18:13:37 [13540]             main::get_json_from_url('http://localhost:9200/_nodes/_local/stats/jvm') called at /etc/munin/plugins/elasticsearch_gc_time line 55
2016/03/22-18:13:37 [13540] Service 'elasticsearch_gc_time' exited with status 13/0.

**$telnet localhost 4949
**Connected to localhost.
Escape character is '^]'.
# munin node at foo
**list**
cpu df df_inode elasticsearch_cache elasticsearch_cluster_shards elasticsearch_docs elasticsearch_gc_time elasticsearch_index_size elasticsearch_index_total elasticsearch_jvm_memory elasticsearch_jvm_pools_size elasticsearch_jvm_threads entropy forks fw_conntrack fw_forwarded_local fw_packets if_eno16780032 if_err_eno16780032 interrupts irqstats load memory netstat ntp_10.204.0.20 ntp_kernel_err ntp_kernel_pll_freq ntp_kernel_pll_off ntp_offset ntp_states open_files open_inodes postfix_mailqueue postfix_mailvolume proc_pri processes swap tcp threads uptime users vmstat
**fetch elasticsearch_cache**
# Bad exit
.
**fetch elasticsearch_cluster_shards**
# Bad exit
.
**fetch elasticsearch_docs**
# Bad exit
.
quit
Connection closed by foreign host.

---
$cat /etc/redhat-release
**Red Hat Enterprise Linux Server release 7.2 (Maipo)**

---
$curl http://localhost:9200/
**{
  "name" : "foo",
  "cluster_name" : "foo-test",
  "version" : {
    "number" : "2.2.0",
    "build_hash" : "8ff36d139e16f8720f2947ef62c8167a888992fe",
    "build_timestamp" : "2016-01-27T13:32:39Z",
    "build_snapshot" : false,
    "lucene_version" : "5.4.1"
  },
  "tagline" : "You Know, for Search"
}**

---
**$ls -lh elasticsearch_* **
lrwxrwxrwx. 1 root root 44 Mar 22 17:11 elasticsearch_cache -> /usr/share/munin/plugins/elasticsearch_cache
lrwxrwxrwx. 1 root root 53 Mar 22 17:11 elasticsearch_cluster_shards -> /usr/share/munin/plugins/elasticsearch_cluster_shards
lrwxrwxrwx. 1 root root 43 Mar 22 17:11 elasticsearch_docs -> /usr/share/munin/plugins/elasticsearch_docs
lrwxrwxrwx. 1 root root 46 Mar 22 17:11 elasticsearch_gc_time -> /usr/share/munin/plugins/elasticsearch_gc_time
lrwxrwxrwx. 1 root root 49 Mar 22 17:11 elasticsearch_index_size -> /usr/share/munin/plugins/elasticsearch_index_size
lrwxrwxrwx. 1 root root 50 Mar 22 17:11 elasticsearch_index_total -> /usr/share/munin/plugins/elasticsearch_index_total
lrwxrwxrwx. 1 root root 49 Mar 22 17:11 elasticsearch_jvm_memory -> /usr/share/munin/plugins/elasticsearch_jvm_memory
lrwxrwxrwx. 1 root root 53 Mar 22 17:11 elasticsearch_jvm_pools_size -> /usr/share/munin/plugins/elasticsearch_jvm_pools_size
lrwxrwxrwx. 1 root root 50 Mar 22 17:11 elasticsearch_jvm_threads -> /usr/share/munin/plugins/elasticsearch_jvm_threads