设置 loadBalancingSpi 后，Ignite Cluster 无法启动答案

【问题标题】：Ignite Cluster is not able to start after setting loadBalancingSpi设置 loadBalancingSpi 后，Ignite Cluster 无法启动
【发布时间】：2019-12-05 04:39:19
【问题描述】：

在我启动 Ignite 集群时配置 RR 负载平衡后，它失败并出现以下错误：

class org.apache.ignite.IgniteCheckedException: Failed to initialize SPI context.
        at org.apache.ignite.internal.managers.GridManagerAdapter.onKernalStart(GridManagerAdapter.java:643)
        at org.apache.ignite.internal.IgniteKernal.start(IgniteKernal.java:1124)
        at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start0(IgnitionEx.java:2038)
        at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start(IgnitionEx.java:1730)
        at org.apache.ignite.internal.IgnitionEx.start0(IgnitionEx.java:1158)
        at org.apache.ignite.internal.IgnitionEx.startConfigurations(IgnitionEx.java:1076)
        at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:962)
        at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:861)
        at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:731)
        at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:700)
        at org.apache.ignite.Ignition.start(Ignition.java:348)
        at org.apache.ignite.startup.cmdline.CommandLineStartup.main(CommandLineStartup.java:301)
Caused by: class org.apache.ignite.spi.IgniteSpiException: Required event types are disabled: TASK_FAILED, TASK_FINISHED, JOB_MAPPED
        at org.apache.ignite.spi.loadbalancing.roundrobin.RoundRobinLoadBalancingSpi.onContextInitialized0(RoundRobinLoadBalancingSpi.java:279)
        at org.apache.ignite.spi.IgniteSpiAdapter.onContextInitialized(IgniteSpiAdapter.java:222)
        at org.apache.ignite.internal.managers.GridManagerAdapter.onKernalStart(GridManagerAdapter.java:368)
        ... 11 more

【问题讨论】：

标签： ignite gridgain

【解决方案1】：

它在错误消息中说：

必需的事件类型已禁用：TASK_FAILED、TASK_FINISHED、JOB_MAPPED

您可以通过following the documentation 启用事件，但基本上，在您的配置文件中添加如下内容：

<!-- Enable cache events. -->
<property name="includeEventTypes">
    <list>
        <util:constant static-field="org.apache.ignite.events.EventType.EVT_TASK_FAILED"/>
        <util:constant static-field="org.apache.ignite.events.EventType.EVT_TASK_FINISHED"/>
        <util:constant static-field="org.apache.ignite.events.EventType.EVT_JOB_MAPPED"/>
    </list>
</property>

【讨论】：

在我启动 Ignite 集群时添加了这些属性后，它失败并出现错误“元素“util:constant”的前缀“util”未绑定”
@sandipbhowmik 您应该按如下方式导入 util 命名空间：<beans ... xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation=" ... http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">