Nagios Support Forum

Hello, I am seeing some of out of memory exception errors that cause all sorts of errors. From that point on if not handled, the whole system seems to be stalled.
I have attached the logs from all 4 nodes in my cluster. Also, I checked the ulimit parameters that were suggested for trouble shooting purposes.

[root@pbur2nls2 elasticsearch]# ps -o nlwp 1302
NLWP
150
[root@pbur2nls2 elasticsearch]# ps -o nlwp 1369
NLWP
59
[root@pbur2nls2 elasticsearch]# ps -eo nlwp | tail -n +2 | awk '{ num_threads += $1 } END { print num_threads }'
417
[root@pbur2nls2 elasticsearch]# ulimit -u
128515
[root@pbur2nls2 elasticsearch]# ulimit -n
1024

How much memory do you have on each node? Could we get some detail about the hardware involved here?

Also, please run the following commands from one of your nodes.

jolson wrote:How much memory do you have on each node? Could we get some detail about the hardware involved here?

Also, please run the following commands from one of your nodes.

Code: Select all

cat /etc/sysconfig/elasticsearch
curl -XGET localhost:9200/_nodes/jvm?pretty

Each Node has 8 VCPU, 16GB RAM


These are the processes and memory allocations for elasticSearch and logstash

nagios 1312 1 21 May20 ? 04:36:43 /usr/bin/java -Xms8g -Xmx8g -Xss256k -Djava.awt.headless=true -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError -XX:+DisableExplicitGC -Des.cluster.name=d5d524d3-1f75-4846-aebd-043e13b0bdb9 -Des.node.name=00a07fa5-7288-4d96-880c-474285dad017 -Des.discovery.zen.ping.unicast.hosts=localhost,10.67.1.246,10.68.1.246,10.68.1.147,10.67.1.247 -Delasticsearch -Des.pidfile=/var/run/elasticsearch/elasticsearch.pid -Des.path.home=/usr/local/nagioslogserver/elasticsearch -cp :/usr/local/nagioslogserver/elasticsearch/lib/elasticsearch-1.3.2.jar:/usr/local/nagioslogserver/elasticsearch/lib/*:/usr/local/nagioslogserver/elasticsearch/lib/sigar/* -Des.default.path.home=/usr/local/nagioslogserver/elasticsearch -Des.default.path.logs=/var/log/elasticsearch -Des.default.path.data=/usr/local/nagioslogserver/elasticsearch/data -Des.default.path.work=/usr/local/nagioslogserver/tmp/elasticsearch -Des.default.path.conf=/usr/local/nagioslogserver/elasticsearch/config org.elasticsearch.bootstrap.Elasticsearch
root 1379 1 0 May20 ? 00:00:00 runuser -s /bin/sh -c exec /usr/local/nagioslogserver/logstash/bin/logstash agent -f /usr/local/nagioslogserver/logstash/etc/conf.d -l /var/log/logstash/logstash.log -w 4 nagios
nagios 1381 1379 99 May20 ? 1-00:52:45 /usr/bin/java -Djava.io.tmpdir=/usr/local/nagioslogserver/tmp -Xmx2g -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -Djava.awt.headless=true -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -jar /usr/local/nagioslogserver/logstash/vendor/jar/jruby-complete-1.7.11.jar -I/usr/local/nagioslogserver/logstash/lib /usr/local/nagioslogserver/logstash/lib/logstash/runner.rb agent -f /usr/local/nagioslogserver/logstash/etc/conf.d -l /var/log/logstash/logstash.log -w 4


cat /etc/sysconfig/elasticsearch
# Directory where the Elasticsearch binary distribution resides
APP_DIR="/usr/local/nagioslogserver"
ES_HOME="$APP_DIR/elasticsearch"

# Heap Size (defaults to 256m min, 1g max)
ES_HEAP_SIZE=8g

# Heap new generation
#ES_HEAP_NEWSIZE=

# max direct memory
#ES_DIRECT_SIZE=

# Additional Java OPTS
#ES_JAVA_OPTS=

# Maximum number of open files
MAX_OPEN_FILES=65535

# Maximum amount of locked memory
#MAX_LOCKED_MEMORY=

# Maximum number of VMA (Virtual Memory Areas) a process can own
MAX_MAP_COUNT=262144

# Elasticsearch log directory
LOG_DIR=/var/log/elasticsearch

# Elasticsearch data directory
DATA_DIR="$ES_HOME/data"

# Elasticsearch work directory
WORK_DIR="$APP_DIR/tmp/elasticsearch"

# Elasticsearch conf directory
CONF_DIR="$ES_HOME/config"

# Elasticsearch configuration file (elasticsearch.yml)
CONF_FILE="$ES_HOME/config/elasticsearch.yml"

# User to run as, change this to a specific elasticsearch user if possible
# Also make sure, this user can write into the log directories in case you change them
# This setting only works for the init script, but has to be configured separately for systemd startup
ES_USER=nagios
ES_GROUP=nagios

# Configure restart on package upgrade (true, every other setting will lead to not restarting)
#RESTART_ON_UPGRADE=true

if [ "x$1" == "xstart" -o "x$1" == "xrestart" -o "x$1" == "xreload" -o "x$1" == "xforce-reload" ];then
GET_ES_CONFIG_MESSAGE="$( php $APP_DIR/scripts/get_es_config.php )"
GET_ES_CONFIG_RETURN=$?

if [ "$GET_ES_CONFIG_RETURN" != "0" ]; then
echo $GET_ES_CONFIG_MESSAGE
exit 1
else
ES_JAVA_OPTS="$GET_ES_CONFIG_MESSAGE"
fi
fi

curl -XGET localhost:9200/_nodes/jvm?pretty
{
"cluster_name" : "d5d524d3-1f75-4846-aebd-043e13b0bdb9",
"nodes" : {
"cuNvwfnFQ1uEiZs4bgdkbg" : {
"name" : "78a3bc74-18f9-46c6-a763-267d4860c047",
"transport_address" : "inet[/xx.xx.1.246:9300]",
"host" : "pden2nls1",
"ip" : "xx.xx.1.246",
"version" : "1.3.2",
"build" : "dee175d",
"http_address" : "inet[localhost/127.0.0.1:9200]",
"attributes" : {
"max_local_storage_nodes" : "1"
},
"jvm" : {
"pid" : 1294,
"version" : "1.7.0_71",
"vm_name" : "OpenJDK 64-Bit Server VM",
"vm_version" : "24.65-b04",
"vm_vendor" : "Oracle Corporation",
"start_time_in_millis" : 1432158624231,
"mem" : {
"heap_init_in_bytes" : 8589934592,
"heap_max_in_bytes" : 8520204288,
"non_heap_init_in_bytes" : 24313856,
"non_heap_max_in_bytes" : 224395264,
"direct_max_in_bytes" : 8520204288
},
"gc_collectors" : [ "ParNew", "ConcurrentMarkSweep" ],
"memory_pools" : [ "Code Cache", "Par Eden Space", "Par Survivor Space", "CMS Old Gen", "CMS Perm Gen" ]
}
},
"VxB_0AoTRD-JB1N88tQbyw" : {
"name" : "617c6cbc-2cb5-4d2b-aae3-445ce04d3040",
"transport_address" : "inet[/xx.xx.1.247:9300]",
"host" : "pbur2nls2",
"ip" : "xx.xx.1.247",
"version" : "1.3.2",
"build" : "dee175d",
"http_address" : "inet[localhost/127.0.0.1:9200]",
"attributes" : {
"max_local_storage_nodes" : "1"
},
"jvm" : {
"pid" : 1302,
"version" : "1.7.0_71",
"vm_name" : "OpenJDK 64-Bit Server VM",
"vm_version" : "24.65-b04",
"vm_vendor" : "Oracle Corporation",
"start_time_in_millis" : 1432136510138,
"mem" : {
"heap_init_in_bytes" : 8589934592,
"heap_max_in_bytes" : 8520204288,
"non_heap_init_in_bytes" : 24313856,
"non_heap_max_in_bytes" : 224395264,
"direct_max_in_bytes" : 8520204288
},
"gc_collectors" : [ "ParNew", "ConcurrentMarkSweep" ],
"memory_pools" : [ "Code Cache", "Par Eden Space", "Par Survivor Space", "CMS Old Gen", "CMS Perm Gen" ]
}
},
"OiKmhgfmQsaQqV5EtVeIvg" : {
"name" : "00a07fa5-7288-4d96-880c-474285dad017",
"transport_address" : "inet[/xx.xx.1.246:9300]",
"host" : "pbur2nls1",
"ip" : "xx.xx.1.246",
"version" : "1.3.2",
"build" : "dee175d",
"http_address" : "inet[localhost/127.0.0.1:9200]",
"attributes" : {
"max_local_storage_nodes" : "1"
},
"jvm" : {
"pid" : 1312,
"version" : "1.7.0_71",
"vm_name" : "OpenJDK 64-Bit Server VM",
"vm_version" : "24.65-b04",
"vm_vendor" : "Oracle Corporation",
"start_time_in_millis" : 1432158392726,
"mem" : {
"heap_init_in_bytes" : 8589934592,
"heap_max_in_bytes" : 8520204288,
"non_heap_init_in_bytes" : 24313856,
"non_heap_max_in_bytes" : 224395264,
"direct_max_in_bytes" : 8520204288
},
"gc_collectors" : [ "ParNew", "ConcurrentMarkSweep" ],
"memory_pools" : [ "Code Cache", "Par Eden Space", "Par Survivor Space", "CMS Old Gen", "CMS Perm Gen" ]
}
},
"NpWXPspTTqOrfBdy3FMAtA" : {
"name" : "18bf7360-254a-43fd-9ecf-9540cfc864a1",
"transport_address" : "inet[/xx.xx.1.147:9300]",
"host" : "pden2nls2",
"ip" : "xx.xx.1.147",
"version" : "1.3.2",
"build" : "dee175d",
"http_address" : "inet[localhost/127.0.0.1:9200]",
"attributes" : {
"max_local_storage_nodes" : "1"
},
"jvm" : {
"pid" : 1302,
"version" : "1.7.0_71",
"vm_name" : "OpenJDK 64-Bit Server VM",
"vm_version" : "24.65-b04",
"vm_vendor" : "Oracle Corporation",
"start_time_in_millis" : 1432158927712,
"mem" : {
"heap_init_in_bytes" : 8589934592,
"heap_max_in_bytes" : 8520204288,
"non_heap_init_in_bytes" : 24313856,
"non_heap_max_in_bytes" : 224395264,
"direct_max_in_bytes" : 8520204288
},
"gc_collectors" : [ "ParNew", "ConcurrentMarkSweep" ],
"memory_pools" : [ "Code Cache", "Par Eden Space", "Par Survivor Space", "CMS Old Gen", "CMS Perm Gen" ]
}
}
}
}

Please set the above variable to: This change is made automatically in Nagios Log Server 1.4. You will need to restart elasticsearch after setting the above: Let me know if that helps with the memory problems you're having.

jolson wrote:

Code: Select all

#MAX_LOCKED_MEMORY=

Please set the above variable to:

Code: Select all

MAX_LOCKED_MEMORY=unlimited

This change is made automatically in Nagios Log Server 1.4. You will need to restart elasticsearch after setting the above:

Code: Select all

service elasticsearch restart

Let me know if that helps with the memory problems you're having.

I will set this up and let you know. Is this associated to all the errors that were captured?

I have seen the above configuration resolve out of memory issues in the past. You can read about what your specific problem means here: https://plumbr.eu/outofmemoryerror/unab ... ive-thread