Question

使用Jmeter在Apache Ignite中生成多个客户端时出现以下错误。启动Apache Ignite客户端时应该是什么堆大小？我试着保持超过512MB，但我仍然得到同样的错误。

Nov 02, 2016 6:54:20 PM org.apache.ignite.logger.java.JavaLogger error
SEVERE: Got exception while starting (will rollback startup routine).
java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method)
        at java.lang.Thread.start(Thread.java:714)
        at org.apache.ignite.internal.processors.timeout.GridTimeoutProcessor.start(GridTimeoutProcessor.java:71)
        at org.apache.ignite.internal.IgniteKernal.startProcessor(IgniteKernal.java:1589)
        at org.apache.ignite.internal.IgniteKernal.start(IgniteKernal.java:839)
        at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start0(IgnitionEx.java:1739)
        at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start(IgnitionEx.java:1589)
        at org.apache.ignite.internal.IgnitionEx.start0(IgnitionEx.java:1042)
        at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:569)
        at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:516)
        at org.apache.ignite.Ignition.start(Ignition.java:322)
        at ignite_client_jmeter.runTest(ignite_client_jmeter.java:1404)
        at org.apache.jmeter.protocol.java.sampler.JavaSampler.sample(JavaSampler.java:196)
        at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:465)
        at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:410)
        at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:241)
        at java.lang.Thread.run(Thread.java:745)

Answer 1

首先，此错误与堆内存无关，它表示您在一个进程中启动了操作系统允许的更多线程。在Linux上，您可以使用ulimit来解决此问题。

其次，看起来你在一个JVM中启动了多个客户端，这是一种不好的做法。 Ignite实例是线程安全的，可以由多个线程同时使用。因此，最好每个JVM创建一个客户端，然后将其用于与集群的所有交互。

在Apache Ignite中创建多个客户端时出错

1 个答案: