我无法使用Oracle JDK 8在CentOS 6（64位）上强制使用ActiveMQ 5.10.1来为LevelDB使用JNI驱动程序。当我设置indexFactory =“org.fusesource.leveldbjni.JniDBFactory”时 - 我的经纪人无法启动。当我省略它时，它确实启动，但它使用Pure Java驱动程序。
<persistenceAdapter>
<levelDB directory="${activemq.data}/leveldb" indexFactory="org.fusesource.leveldbjni.JniDBFactory"/>
</persistenceAdapter>
我在我的操作系统上安装了LevelDB rpm，但在AMQ启动后，其日志文件表明它使用的是纯Java驱动程序：
2015-01-27 05:44:48,172 | INFO | Using Persistence Adapter: LevelDB[/home/roman/amq/DISK1/broker1/data/leveldb] | org.apache.activemq.broker.BrokerService | main
2015-01-27 05:44:48,233 | INFO | Using the pure java LevelDB implementation. | org.apache.activemq.leveldb.LevelDBClient | main
2
我尝试将level-db jni jar文件添加到类路径中，但AMQ无法找到类。这是运行代理（注意带有leveldbjni-1.8.jar的类路径 - AMQ文档并没有真正解释这些可选库是否在默认情况下加载？所以我手动添加了它）：
/home/roman/jdk1.8.0_31/bin/java -Xms1G -Xmx1G -Djava.util.logging.config.file=logging.properties -Djava.security.auth.login.config=/home/roman/amq/DISK1/broker1/conf/login.config -Dcom.sun.management.jmxremote -Djava.awt.headless=true -Djava.io.tmpdir=/home/roman/amq/DISK1/broker1/tmp -Dactivemq.classpath=;/home/roman/amq/DISK1/broker1/conf;/home/roman/apache-activemq-5.10.1/lib/optional/leveldbjni-1.8.jar -Dactivemq.home=/home/roman/apache-activemq-5.10.1 -Dactivemq.base=/home/roman/amq/DISK1/broker1 -Dactivemq.conf=/home/roman/amq/DISK1/broker1/conf -Dactivemq.data=/home/roman/amq/DISK1/broker1/data -jar /home/roman/apache-activemq-5.10.1/bin/activemq.jar start
以下是强制JNI用于LevelDB时我在日志文件中遇到的错误：
2015-01-28 05:07:34,904 | INFO | Refreshing org.apache.activemq.xbean.XBeanBrokerFactory$1@6276ae34: startup date [Wed Jan 28 05:07:34 PST 2015]; root of context hierarchy | org.apache.activemq.xbean.XBeanBrokerFactory$1 | main
2015-01-28 05:07:36,139 | INFO | Using Persistence Adapter: LevelDB[/home/roman/amq/DISK1/broker1/data/leveldb] | org.apache.activemq.broker.BrokerService | main
2015-01-28 05:07:36,193 | ERROR | Failed to start Apache ActiveMQ ([broker1, null], java.lang.Exception: Could not load any of the index factory classes: org.fusesource.leveldbjni.JniDBFactory) | org.apache.activemq.broker.BrokerService | main
2015-01-28 05:07:36,198 | INFO | Apache ActiveMQ 5.10.1 (broker1, null) is shutting down | org.apache.activemq.broker.BrokerService | main
2015-01-28 05:07:36,201 | INFO | Connector openwire stopped | org.apache.activemq.broker.TransportConnector | main
2015-01-28 05:07:36,205 | INFO | Connector amqp stopped | org.apache.activemq.broker.TransportConnector | main
2015-01-28 05:07:36,208 | INFO | Connector stomp stopped | org.apache.activemq.broker.TransportConnector | main
2015-01-28 05:07:36,212 | INFO | Connector mqtt stopped | org.apache.activemq.broker.TransportConnector | main
2015-01-28 05:07:36,215 | INFO | Connector ws stopped | org.apache.activemq.broker.TransportConnector | main
2015-01-28 05:07:36,229 | INFO | Stopped LevelDB[/home/roman/amq/DISK1/broker1/data/leveldb] | org.apache.activemq.leveldb.LevelDBStore | main
2015-01-28 05:07:36,240 | INFO | Apache ActiveMQ 5.10.1 (broker1, null) uptime 0.135 seconds | org.apache.activemq.broker.BrokerService | main
2015-01-28 05:07:36,243 | INFO | Apache ActiveMQ 5.10.1 (broker1, null) is shutdown | org.apache.activemq.broker.BrokerService | main
2015-01-28 05:07:36,246 | INFO | Closing org.apache.activemq.xbean.XBeanBrokerFactory$1@6276ae34: startup date [Wed Jan 28 05:07:34 PST 2015]; root of context hierarchy | org.apache.activemq.xbean.XBeanBrokerFactory$1 | main
2015-01-28 05:07:36,252 | WARN | Exception thrown from LifecycleProcessor on context close | org.apache.activemq.xbean.XBeanBrokerFactory$1 | main
java.lang.IllegalStateException: LifecycleProcessor not initialized - call 'refresh' before invoking lifecycle methods via the context: org.apache.activemq.xbean.XBeanBrokerFactory$1@6276ae34: startup date [Wed Jan 28 05:07:34 PST 2015]; root of context hierarchy
at org.springframework.context.support.AbstractApplicationContext.getLifecycleProcessor(AbstractApplicationContext.java:360)[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1057)[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1010)[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.apache.activemq.hooks.SpringContextHook.run(SpringContextHook.java:30)[activemq-spring-5.10.1.jar:5.10.1]
at org.apache.activemq.broker.BrokerService.stop(BrokerService.java:809)[activemq-broker-5.10.1.jar:5.10.1]
at org.apache.activemq.xbean.XBeanBrokerService.stop(XBeanBrokerService.java:122)[activemq-spring-5.10.1.jar:5.10.1]
at org.apache.activemq.broker.BrokerService.start(BrokerService.java:601)[activemq-broker-5.10.1.jar:5.10.1]
at org.apache.activemq.xbean.XBeanBrokerService.afterPropertiesSet(XBeanBrokerService.java:73)[activemq-spring-5.10.1.jar:5.10.1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.8.0_31]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[:1.8.0_31]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.8.0_31]
at java.lang.reflect.Method.invoke(Method.java:483)[:1.8.0_31]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1638)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1579)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1509)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:296)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:293)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:628)[spring-beans-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE]
at org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicationContext.java:64)[xbean-spring-3.16.jar:3.16]
at org.apache.xbean.spring.context.ResourceXmlApplicationContext.<init>(ResourceXmlApplicationContext.java:52)[xbean-spring-3.16.jar:3.16]
at org.apache.activemq.xbean.XBeanBrokerFactory$1.<init>(XBeanBrokerFactory.java:104)[activemq-spring-5.10.1.jar:5.10.1]
at org.apache.activemq.xbean.XBeanBrokerFactory.createApplicationContext(XBeanBrokerFactory.java:104)[activemq-spring-5.10.1.jar:5.10.1]
at org.apache.activemq.xbean.XBeanBrokerFactory.createBroker(XBeanBrokerFactory.java:67)[activemq-spring-5.10.1.jar:5.10.1]
at org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:71)[activemq-broker-5.10.1.jar:5.10.1]
at org.apache.activemq.broker.BrokerFactory.createBroker(BrokerFactory.java:54)[activemq-broker-5.10.1.jar:5.10.1]
at org.apache.activemq.console.command.StartCommand.runTask(StartCommand.java:87)[activemq-console-5.10.1.jar:5.10.1]
at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)[activemq-console-5.10.1.jar:5.10.1]
at org.apache.activemq.console.command.ShellCommand.runTask(ShellCommand.java:150)[activemq-console-5.10.1.jar:5.10.1]
at org.apache.activemq.console.command.AbstractCommand.execute(AbstractCommand.java:57)[activemq-console-5.10.1.jar:5.10.1]
at org.apache.activemq.console.command.ShellCommand.main(ShellCommand.java:104)[activemq-console-5.10.1.jar:5.10.1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.8.0_31]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[:1.8.0_31]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.8.0_31]
at java.lang.reflect.Method.invoke(Method.java:483)[:1.8.0_31]
at org.apache.activemq.console.Main.runTaskClass(Main.java:262)[activemq.jar:5.10.1]
at org.apache.activemq.console.Main.main(Main.java:115)[activemq.jar:5.10.1]
AMQ doc没有解释如何配置LevelDB以使JNI正常工作。有什么建议吗？
我想使用JNI驱动程序的原因是因为使用纯Java驱动程序，我的AMQ代理在80个并发用户/ 20队列测试中的执行速度比KahaDB慢约20％。我希望使用LevelDB的JNI可以使AMQ比KahaDB配置更快。
答案 0 :(得分：0)
我知道这已经过时了，但我无法在其他任何地方找到答案。我需要做的就是将适当的JNI库下载到ActiveMQ lib目录。例如：
wget -O /etc/activemq/apache-activemq-5.13.0/lib/optional/leveldbjni-linux64-1.8.jar http://central.maven.org/maven2/org/fusesource/leveldbjni/leveldbjni-linux64/1.8/leveldbjni-linux64-1.8.jar