I am having a problem with my graylog server starting.

The issue is very similar to the following threads:
https://groups.google.com/d/msg/graylog2/JbotTATqAiw/udb_ANd_AAAJ
https://groups.google.com/d/msg/graylog2/WJlpfZ9J38E/rh3YA5bEAgAJ

I do not want to do the latter fix which was to install Oracle Java, I do 
not think this is a java issue, yet?

# tail /var/log/graylog-server/server.log -f -n 0
2016-10-12T15:56:12.780-07:00 INFO  [CmdLineTool] Loaded plugin: Elastic Beats 
Input 1.1.1 [org.graylog.plugins.beats.BeatsInputPlugin]
2016-10-12T15:56:12.782-07:00 INFO  [CmdLineTool] Loaded plugin: Collector 
1.1.1 [org.graylog.plugins.collector.CollectorPlugin]
2016-10-12T15:56:12.783-07:00 INFO  [CmdLineTool] Loaded plugin: Enterprise 
Integration Plugin 1.1.1 
[org.graylog.plugins.enterprise_integration.EnterpriseIntegrationPlugin]
2016-10-12T15:56:12.783-07:00 INFO  [CmdLineTool] what is my ipLoaded plugin: 
MapWidgetPlugin 1.1.1 [org.graylog.plugins.map.MapWidgetPlugin]
2016-10-12T15:56:12.784-07:00 INFO  [CmdLineTool] Loaded plugin: Pipeline 
Processor Plugin 1.1.1 [org.graylog.plugins.pipelineprocessor.ProcessorPlugin]
2016-10-12T15:56:12.784-07:00 INFO  [CmdLineTool] Loaded plugin: Anonymous 
Usage Statistics 2.1.1 [org.graylog.plugins.usagestatistics.UsageStatsPlugin]
2016-10-12T15:56:12.897-07:00 INFO  [CmdLineTool] Running with JVM arguments: 
-Xms1g -Xmx1g -XX:NewRatio=1 -XX:+ResizeTLAB -XX:+UseConcMarkSweepGC 
-XX:+CMSConcurrentMTEnabled -XX:+CMSClassUnloadingEnabled -XX:+UseParNewGC 
-XX:-OmitStackTraceInFastThrow 
-Dlog4j.configurationFile=file:///etc/graylog/server/log4j2.xml 
-Djava.library.path=/usr/share/graylog-server/lib/sigar 
-Dgraylog2.installation_source=rpm
2016-10-12T15:56:15.824-07:00 INFO  [InputBufferImpl] Message journal is 
enabled.
2016-10-12T15:56:15.851-07:00 INFO  [NodeId] Node ID: 
7be023c7-4fbb-4ee0-885f-a6fbe86f61be
2016-10-12T15:56:16.119-07:00 INFO  [LogManager] Loading logs.
2016-10-12T15:56:16.162-07:00 WARN  [Log] Found a corrupted index file, 
/var/lib/graylog-server/journal/messagejournal-0/00000000002788345649.index, 
deleting and rebuilding index...
2016-10-12T15:56:17.495-07:00 INFO  [LogManager] Logs loading complete.
2016-10-12T15:56:17.496-07:00 INFO  [KafkaJournal] Initialized Kafka based 
journal at /var/lib/graylog-server/journal
2016-10-12T15:56:17.514-07:00 INFO  [InputBufferImpl] Initialized 
InputBufferImpl with ring size <65536> and wait strategy 
<BlockingWaitStrategy>, running 2 parallel message handlers.
2016-10-12T15:56:17.534-07:00 INFO  [cluster] Cluster created with settings 
{hosts=[<host>.<domain>.com:27017], mode=SINGLE, requiredClusterType=UNKNOWN, 
serverSelectionTimeout='30000 ms', maxWaitQueueSize=5000}
2016-10-12T15:56:17.582-07:00 INFO  [cluster] No server chosen by 
ReadPreferenceServerSelector{readPreference=primary} from cluster description 
ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, 
serverDescriptions=[ServerDescription{address=<host>.<domain>.com:27017, 
type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
2016-10-12T15:56:17.721-07:00 INFO  [connection] Opened connection 
[connectionId{localValue:1, serverValue:18}] to <host>.<domain>.com:27017
2016-10-12T15:56:17.724-07:00 INFO  [cluster] Monitor thread successfully 
connected to server with description 
ServerDescription{address=<host>.<domain>.com:27017, type=STANDALONE, 
state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 2, 10]}, 
minWireVersion=0, maxWireVersion=4, maxDocumentSize=16777216, 
roundTripTimeNanos=996783}
2016-10-12T15:56:17.796-07:00 INFO  [connection] Opened connection 
[connectionId{localValue:2, serverValue:19}] to <host>.<domain>.com:27017
2016-10-12T15:56:18.078-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:18.078-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:18.086-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:20.105-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:20.106-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:20.106-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:20.894-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:20.894-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:20.895-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:21.505-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:21.505-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:21.506-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:22.313-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:22.313-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:22.314-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:22.846-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:22.846-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:22.847-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:24.582-07:00 INFO  [Version] HV000001: Hibernate Validator 
5.2.4.Final
2016-10-12T15:56:24.705-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:24.705-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:24.705-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:25.126-07:00 INFO  [ProcessBuffer] Initialized ProcessBuffer 
with ring size <65536> and wait strategy <BlockingWaitStrategy>.
2016-10-12T15:56:27.208-07:00 INFO  [RulesEngineProvider] No static rules file 
loaded.
2016-10-12T15:56:27.230-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:27.230-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:27.230-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:27.949-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:27.949-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:27.950-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:28.710-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:28.710-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:28.711-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:29.351-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:29.352-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:29.352-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:30.363-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:30.363-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:30.363-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:31.036-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:31.036-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:31.036-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:33.619-07:00 INFO  [OutputBuffer] Initialized OutputBuffer 
with ring size <65536> and wait strategy <BlockingWaitStrategy>.
2016-10-12T15:56:33.621-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:33.621-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:33.621-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:34.167-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:34.167-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:34.167-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:34.697-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:34.697-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:34.699-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:35.357-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:35.357-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:35.357-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:36.299-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:36.300-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:36.300-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:36.880-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:36.880-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:36.880-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:38.647-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:38.648-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:38.648-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:39.200-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:39.200-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:39.201-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:39.765-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:39.766-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:39.766-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:40.336-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:40.336-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:40.337-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:41.292-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:41.292-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:41.293-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:41.886-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:41.886-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:41.887-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:46.960-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:46.961-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:46.961-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:48.778-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:48.778-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:48.779-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:49.294-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:49.294-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:49.295-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:50.970-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:50.971-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:50.971-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:52.905-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:52.906-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:52.906-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:56:54.586-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:56:54.586-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:56:54.586-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:07.447-07:00 INFO  [OutputBuffer] Initialized OutputBuffer 
with ring size <65536> and wait strategy <BlockingWaitStrategy>.
2016-10-12T15:57:07.449-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:07.449-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:07.450-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:09.482-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:09.483-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:09.483-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:09.972-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:09.972-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:09.972-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:11.588-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:11.589-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:11.589-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:14.500-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:14.501-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:14.501-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:16.183-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:16.183-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:16.184-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:24.664-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:24.665-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:24.665-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:26.292-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:26.292-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:26.292-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:28.518-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:28.518-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:28.519-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:31.404-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:31.404-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:31.405-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:35.794-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:35.794-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:35.795-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []
2016-10-12T15:57:38.860-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] version[2.3.5], pid[24257], 
build[90f439f/2016-07-27T10:36:52Z]
2016-10-12T15:57:38.860-07:00 INFO  [node] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] initializing ...
2016-10-12T15:57:38.861-07:00 INFO  [plugins] 
[graylog-7be023c7-4fbb-4ee0-885f-a6fbe86f61be] modules [], plugins 
[graylog-monitor], sites []

My server.conf

# cat /etc/graylog/server/server.conf | egrep -v "^$|^#"
is_master = true
node_id_
  "cluster_name" : "graylog2",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 1,
  "number_of_data_nodes" : 1,
  "active_primary_shards" : 20,
  "active_shards" : 20,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0file = /etc/graylog/server/node-id
password_secret = <hash>
root_password_sha2 = <hash>
root_timezone = UTC
plugin_dir = /usr/share/graylog-server/plugin
rest_listen_uri = http://10.101.10.116:12900/
web_listen_uri = http://10.101.10.116:9000/
rotation_strategy = count
elasticsearch_max_docs_per_index = 20000000
elasticsearch_max_number_of_indices = 20
retention_strategy = delete
elasticsearch_shards = 1
elasticsearch_replicas = 0
elasticsearch_index_prefix = graylog2
allow_leading_wildcard_searches = false
allow_highlighting = false
elasticsearch_cluster_name = graylog2
elasticsearch_discovery_zen_ping_unicast_hosts = <host>.<domain>.net:9300
elasticsearch_analyzer = standard
output_batch_size = 500
output_flush_interval = 1
output_fault_count_threshold = 5
output_fault_penalty_seconds = 30
processbuffer_processors = 5
outputbuffer_processors = 3
processor_wait_strategy = blocking
ring_size = 65536
inputbuffer_ring_size = 65536
inputbuffer_processors = 2
inputbuffer_wait_strategy = blocking
message_journal_enabled = true
message_journal_dir = /var/lib/graylog-server/journal
lb_recognition_period_seconds = 3
mongodb_uri = mongodb://grayloguser:<password>@<host>.<domain>.net/graylog2
mongodb_max_connections = 1000
mongodb_threads_allowed_to_
  "cluster_name" : "graylog2",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 1,
  "number_of_data_nodes" : 1,
  "active_primary_shards" : 20,
  "active_shards" : 20,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0block_multiplier = 5
content_packs_dir = /usr/share/graylog-server/contentpacks
content_packs_auto_load = grok-patterns.json
proxied_requests_thread_pool_size = 32

Elastic looks good

# curl -X GET http://<host>.<domain>.net:9200/_cluster/health?pretty=true
{
  "cluster_name" : "graylog2",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 1,
  "number_of_data_nodes" : 1,
  "active_primary_shards" : 20,
  "active_shards" : 20,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0
}

‚Äč

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