Per my other thread, I decided to delete the VMs and start over from 
scratch.  Instead of running ES on two nodes and Graylog on one of those 
nodes, I've got two VM.  Running ES only and the other running Graylog and 
MongoDB only.

ansted -> x.x.x.146 Running Graylog and MongoDB
ansted-search-01 -> x.x.x.149 Running ElasticSearch

I've attached the two config files (one for Graylog and one for ES).  I 
removed all of the commented out lines from the text files.  I've also 
attached the log file that Graylog is generating.  The repeated error is:

2016-08-04T14:14:09.089-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [18] timed 
out after [3750ms]
at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 
[graylog.jar:?]
at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]

It is trying to connect to the ES server's IP, but I am out of ideas as for 
what is wrong.  I know I have ES set to use port 9300 for transport and 
Graylog is (currently) set to port 9200, but changing Graylog's config file 
doesn't seem to change the error in the Graylog log file.

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2016-08-04T14:13:30.660-04:00 INFO  [CmdLineTool] Loaded plugin: Collector 
1.0.3 [org.graylog.plugins.collector.CollectorPlugin]
2016-08-04T14:13:30.661-04:00 INFO  [CmdLineTool] Loaded plugin: Enterprise 
Integration Plugin 1.0.3 
[org.graylog.plugins.enterprise_integration.EnterpriseIntegrationPlugin]
2016-08-04T14:13:30.661-04:00 INFO  [CmdLineTool] Loaded plugin: 
MapWidgetPlugin 1.0.3 [org.graylog.plugins.map.MapWidgetPlugin]
2016-08-04T14:13:30.661-04:00 INFO  [CmdLineTool] Loaded plugin: Pipeline 
Processor Plugin 1.0.0-beta.5 
[org.graylog.plugins.pipelineprocessor.ProcessorPlugin]
2016-08-04T14:13:30.661-04:00 INFO  [CmdLineTool] Loaded plugin: Anonymous 
Usage Statistics 2.0.3 [org.graylog.plugins.usagestatistics.UsageStatsPlugin]
2016-08-04T14:13:30.734-04:00 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
2016-08-04T14:13:32.757-04:00 INFO  [InputBufferImpl] Message journal is 
enabled.
2016-08-04T14:13:32.926-04:00 INFO  [LogManager] Loading logs.
2016-08-04T14:13:32.990-04:00 INFO  [LogManager] Logs loading complete.
2016-08-04T14:13:32.991-04:00 INFO  [KafkaJournal] Initialized Kafka based 
journal at /var/lib/graylog-server/journal
2016-08-04T14:13:33.003-04:00 INFO  [InputBufferImpl] Initialized 
InputBufferImpl with ring size <65536> and wait strategy 
<BlockingWaitStrategy>, running 2 parallel message handlers.
2016-08-04T14:13:33.034-04:00 INFO  [cluster] Cluster created with settings 
{hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, 
serverSelectionTimeout='30000 ms', maxWaitQueueSize=5000}
2016-08-04T14:13:33.067-04:00 INFO  [cluster] No server chosen by 
ReadPreferenceServerSelector{readPreference=primary} from cluster description 
ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, 
all=[ServerDescription{address=localhost:27017, type=UNKNOWN, 
state=CONNECTING}]}. Waiting for 30000 ms before timing out
2016-08-04T14:13:33.099-04:00 INFO  [connection] Opened connection 
[connectionId{localValue:1, serverValue:84}] to localhost:27017
2016-08-04T14:13:33.100-04:00 INFO  [cluster] Monitor thread successfully 
connected to server with description ServerDescription{address=localhost:27017, 
type=STANDALONE, state=CONNECTED, ok=true, 
version=ServerVersion{versionList=[3, 2, 8]}, minWireVersion=0, 
maxWireVersion=4, maxDocumentSize=16777216, roundTripTimeNanos=568164}
2016-08-04T14:13:33.106-04:00 INFO  [connection] Opened connection 
[connectionId{localValue:2, serverValue:85}] to localhost:27017
2016-08-04T14:13:33.288-04:00 INFO  [NodeId] Node ID: 
f51e5052-55d0-4c4a-92ca-89a28282b3f4
2016-08-04T14:13:33.361-04:00 INFO  [node] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] version[2.3.2], pid[24882], 
build[b9e4a6a/2016-04-21T16:03:47Z]
2016-08-04T14:13:33.361-04:00 INFO  [node] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] initializing ...
2016-08-04T14:13:33.366-04:00 INFO  [plugins] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] modules [], plugins 
[graylog-monitor], sites []
2016-08-04T14:13:34.876-04:00 INFO  [node] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] initialized
2016-08-04T14:13:34.944-04:00 INFO  [Version] HV000001: Hibernate Validator 
5.2.4.Final
2016-08-04T14:13:35.072-04:00 INFO  [ProcessBuffer] Initialized ProcessBuffer 
with ring size <65536> and wait strategy <BlockingWaitStrategy>.
2016-08-04T14:13:36.748-04:00 INFO  [RulesEngineProvider] No static rules file 
loaded.
2016-08-04T14:13:36.798-04:00 INFO  [connection] Opened connection 
[connectionId{localValue:3, serverValue:86}] to localhost:27017
2016-08-04T14:13:36.977-04:00 WARN  [GeoIpResolverEngine] GeoIP database file 
does not exist: /tmp/GeoLite2-City.mmdb
2016-08-04T14:13:36.990-04:00 INFO  [OutputBuffer] Initialized OutputBuffer 
with ring size <65536> and wait strategy <BlockingWaitStrategy>.
2016-08-04T14:13:37.074-04:00 INFO  [connection] Opened connection 
[connectionId{localValue:4, serverValue:87}] to localhost:27017
2016-08-04T14:13:37.085-04:00 WARN  [GeoIpResolverEngine] GeoIP database file 
does not exist: /tmp/GeoLite2-City.mmdb
2016-08-04T14:13:37.161-04:00 WARN  [GeoIpResolverEngine] GeoIP database file 
does not exist: /tmp/GeoLite2-City.mmdb
2016-08-04T14:13:37.263-04:00 WARN  [GeoIpResolverEngine] GeoIP database file 
does not exist: /tmp/GeoLite2-City.mmdb
2016-08-04T14:13:37.300-04:00 WARN  [GeoIpResolverEngine] GeoIP database file 
does not exist: /tmp/GeoLite2-City.mmdb
2016-08-04T14:13:37.778-04:00 INFO  [ServerBootstrap] Graylog server 2.0.3 
(f07c170) starting up
2016-08-04T14:13:37.778-04:00 INFO  [ServerBootstrap] JRE: Oracle Corporation 
1.8.0_101 on Linux 3.10.0-327.28.2.el7.x86_64
2016-08-04T14:13:37.778-04:00 INFO  [ServerBootstrap] Deployment: rpm
2016-08-04T14:13:37.778-04:00 INFO  [ServerBootstrap] OS: CentOS Linux 7 (Core) 
(centos)
2016-08-04T14:13:37.778-04:00 INFO  [ServerBootstrap] Arch: amd64
2016-08-04T14:13:37.782-04:00 WARN  [DeadEventLoggingListener] Received 
unhandled event of type <org.graylog2.plugin.lifecycles.Lifecycle> from event 
bus <AsyncEventBus{graylog-eventbus}>
2016-08-04T14:13:37.808-04:00 INFO  [PeriodicalsService] Starting 24 
periodicals ...
2016-08-04T14:13:37.808-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.ThroughputCalculator] periodical in [0s], polling 
every [1s].
2016-08-04T14:13:37.810-04:00 INFO  [node] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] starting ...
2016-08-04T14:13:37.812-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.AlertScannerThread] periodical in [10s], polling every 
[60s].
2016-08-04T14:13:37.812-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.BatchedElasticSearchOutputFlushThread] periodical in 
[0s], polling every [1s].
2016-08-04T14:13:37.812-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.ClusterHealthCheckThread] periodical in [0s], polling 
every [20s].
2016-08-04T14:13:37.813-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.ContentPackLoaderPeriodical] periodical, running 
forever.
2016-08-04T14:13:37.814-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.GarbageCollectionWarningThread] periodical, running 
forever.
2016-08-04T14:13:37.815-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.IndexerClusterCheckerThread] periodical in [0s], 
polling every [30s].
2016-08-04T14:13:37.815-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.IndexRetentionThread] periodical in [0s], polling 
every [300s].
2016-08-04T14:13:37.817-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.IndexRotationThread] periodical in [0s], polling every 
[10s].
2016-08-04T14:13:37.817-04:00 INFO  [IndexRetentionThread] Elasticsearch 
cluster not available, skipping index retention checks.
2016-08-04T14:13:37.818-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.NodePingThread] periodical in [0s], polling every [1s].
2016-08-04T14:13:37.818-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.VersionCheckThread] periodical in [300s], polling 
every [1800s].
2016-08-04T14:13:37.818-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.ThrottleStateUpdaterThread] periodical in [1s], 
polling every [1s].
2016-08-04T14:13:37.819-04:00 INFO  [Periodicals] Starting 
[org.graylog2.events.ClusterEventPeriodical] periodical in [0s], polling every 
[1s].
2016-08-04T14:13:37.819-04:00 INFO  [Periodicals] Starting 
[org.graylog2.events.ClusterEventCleanupPeriodical] periodical in [0s], polling 
every [300s].
2016-08-04T14:13:37.820-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.ClusterIdGeneratorPeriodical] periodical, running 
forever.
2016-08-04T14:13:37.820-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.IndexRangesMigrationPeriodical] periodical, running 
forever.
2016-08-04T14:13:37.820-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.IndexRangesCleanupPeriodical] periodical in [15s], 
polling every [3600s].
2016-08-04T14:13:37.835-04:00 INFO  [connection] Opened connection 
[connectionId{localValue:6, serverValue:89}] to localhost:27017
2016-08-04T14:13:37.835-04:00 INFO  [connection] Opened connection 
[connectionId{localValue:5, serverValue:88}] to localhost:27017
2016-08-04T14:13:37.855-04:00 INFO  [IndexerClusterCheckerThread] Indexer not 
fully initialized yet. Skipping periodic cluster check.
2016-08-04T14:13:37.893-04:00 INFO  [connection] Opened connection 
[connectionId{localValue:7, serverValue:90}] to localhost:27017
2016-08-04T14:13:37.956-04:00 INFO  [PeriodicalsService] Not starting 
[org.graylog2.periodical.UserPermissionMigrationPeriodical] periodical. Not 
configured to run on this node.
2016-08-04T14:13:37.956-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.AlarmCallbacksMigrationPeriodical] periodical, running 
forever.
2016-08-04T14:13:37.956-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.ConfigurationManagementPeriodical] periodical, running 
forever.
2016-08-04T14:13:37.991-04:00 INFO  [Periodicals] Starting 
[org.graylog2.periodical.LdapGroupMappingMigration] periodical, running forever.
2016-08-04T14:13:38.012-04:00 INFO  [Periodicals] Starting 
[org.graylog.plugins.usagestatistics.UsageStatsNodePeriodical] periodical in 
[300s], polling every [21600s].
2016-08-04T14:13:38.012-04:00 INFO  [Periodicals] Starting 
[org.graylog.plugins.usagestatistics.UsageStatsClusterPeriodical] periodical in 
[300s], polling every [21600s].
2016-08-04T14:13:38.012-04:00 INFO  [Periodicals] Starting 
[org.graylog.plugins.collector.periodical.PurgeExpiredCollectorsThread] 
periodical in [0s], polling every [3600s].
2016-08-04T14:13:38.203-04:00 INFO  [transport] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] publish_address 
{127.0.0.1:9200}, bound_addresses {[::1]:9200}, {127.0.0.1:9200}
2016-08-04T14:13:38.209-04:00 INFO  [discovery] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] graylog/CNFExff9S0ivUhydyR6mXQ
2016-08-04T14:13:38.296-04:00 INFO  [AbstractJerseyService] Enabling CORS for 
HTTP endpoint
2016-08-04T14:13:40.953-04:00 INFO  [NetworkListener] Started listener bound to 
[x.x.x.146:9000]
2016-08-04T14:13:40.954-04:00 INFO  [HttpServer] [HttpServer] Started.
2016-08-04T14:13:40.955-04:00 INFO  [WebInterfaceService] Started Web Interface 
at <http://x.x.x.146:9000/>
2016-08-04T14:13:41.212-04:00 WARN  [discovery] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] waited for 3s and no initial 
state was set by the discovery
2016-08-04T14:13:41.213-04:00 INFO  [node] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] started
2016-08-04T14:13:42.123-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [0] timed out 
after [3765ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
2016-08-04T14:13:44.430-04:00 INFO  [NetworkListener] Started listener bound to 
[x.x.x.146:12900]
2016-08-04T14:13:44.433-04:00 INFO  [HttpServer] [HttpServer-1] Started.
2016-08-04T14:13:44.434-04:00 INFO  [RestApiService] Started REST API at 
<http://x.x.x.146:12900/>
2016-08-04T14:13:46.219-04:00 WARN  [IndexerSetupService] Could not connect to 
Elasticsearch
2016-08-04T14:13:46.219-04:00 INFO  [IndexerSetupService] If you're using 
multicast, check that it is working in your network and that Elasticsearch is 
accessible. Also check that the cluster name setting is correct.
2016-08-04T14:13:46.220-04:00 INFO  [IndexerSetupService] See 
http://docs.graylog.org/en/2.0/pages/configuration/elasticsearch.html for 
details.
2016-08-04T14:13:46.222-04:00 INFO  [ServiceManagerListener] Services are 
healthy
2016-08-04T14:13:46.224-04:00 INFO  [ServerBootstrap] Services started, startup 
times in ms: {OutputSetupService [RUNNING]=31, BufferSynchronizerService 
[RUNNING]=31, JournalReader [RUNNING]=33, InputSetupService [RUNNING]=35, 
MetricsReporterService [RUNNING]=44, KafkaJournal [RUNNING]=45, 
PeriodicalsService [RUNNING]=211, WebInterfaceService [RUNNING]=3149, 
RestApiService [RUNNING]=6636, IndexerSetupService [RUNNING]=8416}
2016-08-04T14:13:46.230-04:00 INFO  [ServerBootstrap] Graylog server up and 
running.
2016-08-04T14:13:46.237-04:00 INFO  [InputSetupService] Triggering launching 
persisted inputs, node transitioned from Uninitialized [LB:DEAD] to Running 
[LB:ALIVE]
2016-08-04T14:13:46.674-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [3] timed out 
after [3751ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
2016-08-04T14:13:51.057-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [6] timed out 
after [3755ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
2016-08-04T14:13:52.821-04:00 INFO  [IndexRangesCleanupPeriodical] Skipping 
index range cleanup because the Elasticsearch cluster is unreachable or 
unhealthy
2016-08-04T14:14:00.085-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [12] timed out 
after [3750ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
2016-08-04T14:14:04.587-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [15] timed out 
after [3750ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
2016-08-04T14:14:09.089-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [18] timed out 
after [3750ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
2016-08-04T14:14:13.591-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [21] timed out 
after [3750ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
2016-08-04T14:14:18.093-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [24] timed out 
after [3751ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
2016-08-04T14:14:25.599-04:00 WARN  [unicast] 
[graylog-f51e5052-55d0-4c4a-92ca-89a28282b3f4] failed to send ping to 
[{#zen_unicast_1#}{x.x.x.149}{x.x.x.149:9200}]
org.elasticsearch.transport.ReceiveTimeoutTransportException: 
[][x.x.x.149:9200][internal:discovery/zen/unicast] request_id [30] timed out 
after [3750ms]
        at 
org.elasticsearch.transport.TransportService$TimeoutHandler.run(TransportService.java:679)
 [graylog.jar:?]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_101]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_101]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
is_master = true
node_id_file = /etc/graylog/server/node-id
password_secret = Secret!
root_password_sha2 = Secret!
plugin_dir = /usr/share/graylog-server/plugin
rest_listen_uri = http://x.x.x.146:12900/
web_enable = true
web_listen_uri = http://x.x.x.146:9000/
web_endpoint_uri = http://x.x.x.146:9000/
rotation_strategy = count
elasticsearch_max_docs_per_index = 20000000
rotation_strategy = count
elasticsearch_max_docs_per_index = 20000000
elasticsearch_max_number_of_indices = 20
retention_strategy = delete
elasticsearch_max_number_of_indices = 20
retention_strategy = delete
elasticsearch_shards = 4
elasticsearch_replicas = 0
elasticsearch_index_prefix = graylog
allow_leading_wildcard_searches = false
allow_highlighting = false
elasticsearch_cluster_name = graylog
elasticsearch_discovery_zen_ping_unicast_hosts = x.x.x.149
elasticsearch_transport_tcp_port = 9200
elasticsearch_http_enabled = false
elasticsearch_discovery_zen_ping_multicast_enabled = true
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://localhost/graylog
mongodb_max_connections = 1000
mongodb_threads_allowed_to_block_multiplier = 5
content_packs_dir = /usr/share/graylog-server/contentpacks
content_packs_auto_load = grok-patterns.json

Attachment: ES Config
Description: Binary data

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