I'm having a heck of a time getting GrayLog to start up the web interface 
part.  The service starts up fine but the web interface never shows up. 
 I'm seeing the following error in the server.log file:

2017-02-09T09:57:57.568-07:00 INFO  [CmdLineTool] Loaded plugin: Elastic 
Beats Input 1.1.5 [org.graylog.plugins.beats.BeatsInputPlugin]
2017-02-09T09:57:57.570-07:00 INFO  [CmdLineTool] Loaded plugin: Collector 
1.1.3 [org.graylog.plugins.collector.CollectorPlugin]
2017-02-09T09:57:57.570-07:00 INFO  [CmdLineTool] Loaded plugin: Enterprise 
Integration Plugin 1.1.3 
[org.graylog.plugins.enterprise_integration.EnterpriseIntegrationPlugin]
2017-02-09T09:57:57.571-07:00 INFO  [CmdLineTool] Loaded plugin: 
MapWidgetPlugin 1.1.3 [org.graylog.plugins.map.MapWidgetPlugin]
2017-02-09T09:57:57.571-07:00 INFO  [CmdLineTool] Loaded plugin: Pipeline 
Processor Plugin 1.1.3 
[org.graylog.plugins.pipelineprocessor.ProcessorPlugin]
2017-02-09T09:57:57.571-07:00 INFO  [CmdLineTool] Loaded plugin: Anonymous 
Usage Statistics 2.1.3 
[org.graylog.plugins.usagestatistics.UsageStatsPlugin]
2017-02-09T09:57:57.671-07:00 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=deb
2017-02-09T09:57:57.876-07:00 INFO  [Version] HV000001: Hibernate Validator 
5.2.4.Final
2017-02-09T09:58:00.067-07:00 INFO  [InputBufferImpl] Message journal is 
enabled.
2017-02-09T09:58:00.089-07:00 INFO  [NodeId] Node ID: 
7b717cb0-eac2-4097-9f92-4a5ac9b81ef3
2017-02-09T09:58:00.293-07:00 INFO  [LogManager] Loading logs.
2017-02-09T09:58:00.341-07:00 INFO  [LogManager] Logs loading complete.
2017-02-09T09:58:00.342-07:00 INFO  [KafkaJournal] Initialized Kafka based 
journal at /var/lib/graylog-server/journal
2017-02-09T09:58:00.358-07:00 INFO  [InputBufferImpl] Initialized 
InputBufferImpl with ring size <65536> and wait strategy 
<BlockingWaitStrategy>, running 2 parallel message handlers.
2017-02-09T09:58:00.376-07:00 INFO  [cluster] Cluster created with settings 
{hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, 
serverSelectionTimeout='30000 ms', maxWaitQueueSize=5000}
2017-02-09T09:58:00.426-07:00 INFO  [cluster] No server chosen by 
ReadPreferenceServerSelector{readPreference=primary} from cluster 
description ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, 
serverDescriptions=[ServerDescription{address=localhost:27017, 
type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
2017-02-09T09:58:00.438-07:00 INFO  [connection] Opened connection 
[connectionId{localValue:1, serverValue:9}] to localhost:27017
2017-02-09T09:58:00.439-07:00 INFO  [cluster] Monitor thread successfully 
connected to server with description 
ServerDescription{address=localhost:27017, type=STANDALONE, 
state=CONNECTED, ok=true, version=ServerVersion{versionList=[2, 6, 10]}, 
minWireVersion=0, maxWireVersion=2, maxDocumentSize=16777216, 
roundTripTimeNanos=512192}
2017-02-09T09:58:00.448-07:00 INFO  [connection] Opened connection 
[connectionId{localValue:2, serverValue:10}] to localhost:27017
2017-02-09T09:58:00.770-07:00 INFO  [node] 
[graylog-7b717cb0-eac2-4097-9f92-4a5ac9b81ef3] version[2.3.5], pid[28236], 
build[90f439f/2016-07-27T10:36:52Z]
2017-02-09T09:58:00.770-07:00 INFO  [node] 
[graylog-7b717cb0-eac2-4097-9f92-4a5ac9b81ef3] initializing ...
2017-02-09T09:58:00.776-07:00 INFO  [plugins] 
[graylog-7b717cb0-eac2-4097-9f92-4a5ac9b81ef3] modules [], plugins 
[graylog-monitor], sites []
2017-02-09T09:58:02.438-07:00 INFO  [node] 
[graylog-7b717cb0-eac2-4097-9f92-4a5ac9b81ef3] initialized
2017-02-09T09:58:02.576-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:04.383-07:00 INFO  [RulesEngineProvider] No static rules 
file loaded.
2017-02-09T09:58:04.431-07:00 INFO  [OutputBuffer] Initialized OutputBuffer 
with ring size <65536> and wait strategy <BlockingWaitStrategy>.
2017-02-09T09:58:04.640-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:04.762-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.052-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.157-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.240-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.408-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.501-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.573-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.633-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.719-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.802-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.859-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.911-07:00 INFO  [ProcessBuffer] Initialized 
ProcessBuffer with ring size <65536> and wait strategy 
<BlockingWaitStrategy>.
2017-02-09T09:58:05.967-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.967-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.967-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.967-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.967-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.967-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.968-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.968-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.968-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.968-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.968-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.968-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.968-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException
2017-02-09T09:58:05.968-07:00 ERROR [CmdLineTool] Guice error (more detail 
on log level debug): Error injecting constructor, 
java.lang.NullPointerException

Things we've tried over the past few days:

1. Ensured mongodb and elasticsearch are both up and running error-free.
2. Uninstalled and reinstalled everything.
3. Made sure we have Java installed.

There is more but it's been a really long couple of days trying to sort 
this out.  I'm more than open to someone pointing me in the right direction 
here.

Thanks,

Dave

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