Python 为什么Rexster服务器（和Titan）停止响应？ 安装程序

我正在使用Titan Rexster（Titan-Server-0.4.4.zip）和Elasticsearch后端实现一个在Ubuntu 12.4服务器上运行的推荐系统。为了连接到Rexster服务器，我使用python的Bulbflow库

Beta版在3周内似乎运行良好，但随着负载“增加”（只有几个用户~10），Rexster服务器停止响应。我不知道我的rexster配置是否错误，或者我没有正确使用Bulbflow库

雷克斯特/泰坦配置 这是我的rexster-cassandra-es.xml：

    <?xml version="1.0" encoding="UTF-8"?>
    <rexster>
        <http>
            <server-port>8182</server-port>
            <server-host>0.0.0.0</server-host>
            <base-uri>http://MY_IP</base-uri>
            <web-root>public</web-root>
            <character-set>UTF-8</character-set>
            <enable-jmx>false</enable-jmx>
            <enable-doghouse>true</enable-doghouse>
            <max-post-size>2097152</max-post-size>
            <max-header-size>8192</max-header-size>
            <upload-timeout-millis>30000</upload-timeout-millis>
            <thread-pool>
                <worker>
                    <core-size>20</core-size>
                    <max-size>40</max-size>
                </worker>
                <kernal>
                    <core-size>10</core-size>
                    <max-size>20</max-size>
                </kernal>
            </thread-pool>
            <io-strategy>leader-follower</io-strategy>
        </http>
        <rexpro>
            <server-port>8184</server-port>
            <server-host>0.0.0.0</server-host>
            <session-max-idle>1790000</session-max-idle>
            <session-check-interval>3000000</session-check-interval>
            <connection-max-idle>180000</connection-max-idle>
            <connection-check-interval>3000000</connection-check-interval>
            <enable-jmx>false</enable-jmx>
            <thread-pool>
                <worker>
                    <core-size>8</core-size>
                    <max-size>8</max-size>
                </worker>
                <kernal>
                    <core-size>4</core-size>
                    <max-size>4</max-size>
                </kernal>
            </thread-pool>
            <io-strategy>leader-follower</io-strategy>
        </rexpro>
        <shutdown-port>8183</shutdown-port>
        <shutdown-host>127.0.0.1</shutdown-host>
        <script-engines>
            <script-engine>
                <name>gremlin-groovy</name>
                <reset-threshold>-1</reset-threshold>
                <imports>com.tinkerpop.gremlin.*,com.tinkerpop.gremlin.java.*,com.tinkerpop.gremlin.pipes.filter.*,com.tinkerpop.gremlin.pipes.sideeffect.*,com.tinkerpop.gremlin.pipes.transform.*,com.tinkerpop.blueprints.*,com.tinkerpop.blueprints.impls.*,com.tinkerpop.blueprints.impls.tg.*,com.tinkerpop.blueprints.impls.neo4j.*,com.tinkerpop.blueprints.impls.neo4j.batch.*,com.tinkerpop.blueprints.impls.orient.*,com.tinkerpop.blueprints.impls.orient.batch.*,com.tinkerpop.blueprints.impls.dex.*,com.tinkerpop.blueprints.impls.rexster.*,com.tinkerpop.blueprints.impls.sail.*,com.tinkerpop.blueprints.impls.sail.impls.*,com.tinkerpop.blueprints.util.*,com.tinkerpop.blueprints.util.io.*,com.tinkerpop.blueprints.util.io.gml.*,com.tinkerpop.blueprints.util.io.graphml.*,com.tinkerpop.blueprints.util.io.graphson.*,com.tinkerpop.blueprints.util.wrappers.*,com.tinkerpop.blueprints.util.wrappers.batch.*,com.tinkerpop.blueprints.util.wrappers.batch.cache.*,com.tinkerpop.blueprints.util.wrappers.event.*,com.tinkerpop.blueprints.util.wrappers.event.listener.*,com.tinkerpop.blueprints.util.wrappers.id.*,com.tinkerpop.blueprints.util.wrappers.partition.*,com.tinkerpop.blueprints.util.wrappers.readonly.*,com.tinkerpop.blueprints.oupls.sail.*,com.tinkerpop.blueprints.oupls.sail.pg.*,com.tinkerpop.blueprints.oupls.jung.*,com.tinkerpop.pipes.*,com.tinkerpop.pipes.branch.*,com.tinkerpop.pipes.filter.*,com.tinkerpop.pipes.sideeffect.*,com.tinkerpop.pipes.transform.*,com.tinkerpop.pipes.util.*,com.tinkerpop.pipes.util.iterators.*,com.tinkerpop.pipes.util.structures.*,org.apache.commons.configuration.*,com.thinkaurelius.titan.core.*,com.thinkaurelius.titan.core.attribute.*,com.thinkaurelius.titan.core.util.*,com.thinkaurelius.titan.example.*,org.apache.commons.configuration.*,com.tinkerpop.gremlin.Tokens.T,com.tinkerpop.gremlin.groovy.*</imports>
            <static-imports>com.tinkerpop.blueprints.Direction.*,com.tinkerpop.blueprints.TransactionalGraph$Conclusion.*,com.tinkerpop.blueprints.Compare.*,com.thinkaurelius.titan.core.attribute.Geo.*,com.thinkaurelius.titan.core.attribute.Text.*,com.thinkaurelius.titan.core.TypeMaker$UniquenessConsistency.*,com.tinkerpop.blueprints.Query$Compare.*</static-imports>
            </script-engine>
        </script-engines>
        <security>
            <authentication>
                <type>none</type>
                <configuration>
                    <users>
                        <user>
                            <username>rexster</username>
                            <password>rexster</password>
                        </user>
                    </users>
                </configuration>
            </authentication>
        </security>
        <metrics>
            <reporter>
                <type>jmx</type>
            </reporter>
            <reporter>
                <type>http</type>
            </reporter>
            <reporter>
                <type>console</type>
                <properties>
                    <rates-time-unit>SECONDS</rates-time-unit>
                    <duration-time-unit>SECONDS</duration-time-unit>
                    <report-period>10</report-period>
                    <report-time-unit>MINUTES</report-time-unit>
                    <includes>http.rest.*</includes>
                    <excludes>http.rest.*.delete</excludes>
                </properties>
            </reporter>
        </metrics>
        <graphs>
            <graph>
                <graph-name>newspaper</graph-name>
                <graph-type>com.thinkaurelius.titan.tinkerpop.rexster.TitanGraphConfiguration</graph-type>
                <!-- <graph-location>/tmp/titan</graph-location> -->
                <graph-read-only>false</graph-read-only>
                <properties>
                    <storage.backend>cassandra</storage.backend>
                    <storage.index.search.backend>elasticsearch</storage.index.search.backend>
                    <storage.index.search.hostname>localhost</storage.index.search.hostname>
                    <storage.index.search.client-only>true</storage.index.search.client-only>
                    <storage.index.search.local-mode>false</storage.index.search.local-mode>
                </properties>
                <extensions>
                  <allows>
                    <allow>tp:gremlin</allow>
                  </allows>
                </extensions>
            </graph>
        </graphs>
    </rexster>

恢复 为了恢复，我必须关闭rexster/titan并重新启动它。每当我停止Rexster服务器（./bin/titan-c cassandra es stop）时，我都会收到以下输出：

Killing Titan + Rexster (pid 26779)...
Rexster shutdown timeout exceeded (60 seconds)
Killing Cassandra (pid 26201)...

雷克斯特完全卡住了

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期待收到一些有用的指导。

首先，我建议您迁移到titan 1.0版本，因为Rexster已被Gremlin Server所取代，并进行了一些重大更改。 如果仍然需要使用titan 0.4.4版本，那么我会说尝试将其作为服务运行。会话可能会结束，因此实例会终止所有作业

检查以下文档。

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Titan邮件列表上的以下线程可能对您有用：。然而，我认为他们从来没有为泰坦解决过这个问题，雷克斯特的开发者也无法复制它

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话虽如此，我强烈建议升级到Titan v1.0.0，它使用TinkerPop 3.0+Gremlin服务器，而不是TinkerPop 2.x Rexster。您将获得更少的bug、更多的功能，尤其是更具表现力的Gremlin查询（请参阅）。Titan v0.4.4是一个非常旧的版本，我认为解决这个特定问题不值得费心，特别是如果您是图形新手。

我也有同样的问题。如果您有任何解决方案，请在此更新。请检查此选项，这将有助于提高您的内容质量

Killing Titan + Rexster (pid 26779)...
Rexster shutdown timeout exceeded (60 seconds)
Killing Cassandra (pid 26201)...