Hi,

I have a Gremlin Server Running v3.3.3
I am connecting to it remotely to run my gremlin queries via Java. But recently I'm bombarded with this error

`org.apache.tinkerpop.gremlin.process.remote.RemoteConnectionException: java.lang.RuntimeException: java.lang.RuntimeException: java.util.concurrent.TimeoutException: Timed out while waiting for an available host - check the client configuration and connectivity to the server if this message persists`

Initially, when I faced this issue, I used to restart gremlin service and it used to work again but this that doesn't solve the problem anymore. I'm not sure what is the issue here

Here is my remote-objects.yaml file
```

hosts: [fci-graph-writer-gremlin]

port: 8182

serializer: { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry,org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV3d0] }}

connectionPool: {

  channelizer: Channelizer.WebSocketChannelizer,

  maxContentLength: 81928192

}
```

gremlin-server.yaml
```

host: 0

port: 8182

scriptEvaluationTimeout: 120000

threadPoolWorker: 4

gremlinPool: 16

channelizer: org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer

graphs: {

  fci: conf/janusgraph-hbase.properties,

  insights: conf/janusgraph-insights-hbase.properties

}

scriptEngines: {

  gremlin-groovy: {

    plugins: { org.janusgraph.graphdb.tinkerpop.plugin.JanusGraphGremlinPlugin: {},

               org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin: {},

               org.apache.tinkerpop.gremlin.tinkergraph.jsr223.TinkerGraphGremlinPlugin: {},

               org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {classImports: [java.lang.Math], methodImports: [java.lang.Math#*]},

               org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {files: [scripts/empty-sample.groovy]}},

    scripts: [scripts/empty-sample.groovy], 

    staticImports: ['org.opencypher.gremlin.process.traversal.CustomPredicates.*']}}

serializers:

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry,org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIoRegistryV3d0] }}

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { serializeResultToString: true }}

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}

  # Older serialization versions for backwards compatibility:

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0, config: {ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { serializeResultToString: true }}

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV2d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}

  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}

processors:

  - { className: org.apache.tinkerpop.gremlin.server.op.session.SessionOpProcessor, config: { sessionTimeout: 28800000 }}

  - { className: org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor, config: { cacheExpirationTime: 600000, cacheMaxSize: 1000 }}

  - { className: org.opencypher.gremlin.server.op.cypher.CypherOpProcessor, config: { sessionTimeout: 28800000}}

metrics: {

  consoleReporter: {enabled: true, interval: 180000},

  csvReporter: {enabled: false, interval: 180000, fileName: /tmp/gremlin-server-metrics.csv},

  jmxReporter: {enabled: false},

  slf4jReporter: {enabled: false, interval: 180000},

  gangliaReporter: {enabled: false, interval: 180000, addressingMode: MULTICAST},

  graphiteReporter: {enabled: false, interval: 180000}}

threadPoolBoss: 1

maxInitialLineLength: 4096

maxHeaderSize: 8192

maxChunkSize: 8192

maxContentLength: 81928192

maxAccumulationBufferComponents: 1024

resultIterationBatchSize: 64

writeBufferLowWaterMark: 32768

writeBufferHighWaterMark: 65536

ssl: {

enabled: false}
```

pom.xml
```

<dependency>

<groupId>org.janusgraph</groupId>

<artifactId>janusgraph-all</artifactId>

<version>0.3.1</version>

</dependency>

<dependency>

<groupId>org.apache.tinkerpop</groupId>

<artifactId>gremlin-driver</artifactId>

<version>3.3.3</version>

</dependency>

<dependency>

<groupId>org.apache.tinkerpop</groupId>

<artifactId>tinkergraph-gremlin</artifactId>

<version>3.3.3</version>

</dependency>
```

I'm really stuck here. Any help is appreciated. Thanks!!

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