Gremlin server configuration updates. Includes removal of reference to pure nashorn ScriptEngine, which is no longer supported (see apache/tinkerpop@b93feb4#diff-405cf53bc6db5ca966b3a3b764720101).

Author: sjudeng

titan-dist/src/assembly/static/conf/gremlin-server/gremlin-server.yaml

@@ -1,9 +1,6 @@
 host: localhost
 port: 8182
-threadPoolWorker: 1
-gremlinPool: 8
 scriptEvaluationTimeout: 30000
-serializedResponseTimeout: 30000
 channelizer: org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer
 graphs: {
   graph: conf/gremlin-server/titan-cassandra-es-server.properties}
@@ -13,32 +10,31 @@ scriptEngines: {
   gremlin-groovy: {
     imports: [java.lang.Math],
     staticImports: [java.lang.Math.PI],
-    scripts: [scripts/empty-sample.groovy]},
-  nashorn: {
-      imports: [java.lang.Math],
-      staticImports: [java.lang.Math.PI]}}
+    scripts: [scripts/empty-sample.groovy]}}
 serializers:
   - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { ioRegistries: [com.thinkaurelius.titan.graphdb.tinkerpop.TitanIoRegistry] }}
+  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0, config: {ioRegistries: [com.thinkaurelius.titan.graphdb.tinkerpop.TitanIoRegistry] }}
   - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { serializeResultToString: true }}
   - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV1d0, config: { ioRegistries: [com.thinkaurelius.titan.graphdb.tinkerpop.TitanIoRegistry] }}
+  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV2d0, config: { ioRegistries: [com.thinkaurelius.titan.graphdb.tinkerpop.TitanIoRegistry] }}
   - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0, config: { ioRegistries: [com.thinkaurelius.titan.graphdb.tinkerpop.TitanIoRegistry] }}
 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 }}
 metrics: {
   consoleReporter: {enabled: true, interval: 180000},
   csvReporter: {enabled: true, interval: 180000, fileName: /tmp/gremlin-server-metrics.csv},
   jmxReporter: {enabled: true},
   slf4jReporter: {enabled: true, interval: 180000},
   gangliaReporter: {enabled: false, interval: 180000, addressingMode: MULTICAST},
   graphiteReporter: {enabled: false, interval: 180000}}
-threadPoolBoss: 1
 maxInitialLineLength: 4096
 maxHeaderSize: 8192
 maxChunkSize: 8192
 maxContentLength: 65536
 maxAccumulationBufferComponents: 1024
 resultIterationBatchSize: 64
-writeBufferHighWaterMark: 32768
+writeBufferLowWaterMark: 32768
 writeBufferHighWaterMark: 65536
 ssl: {
   enabled: false}