IGNITE TROUBLESHOOT

1. H2 Console 设置系统变量 set IGNITE_H2_DEBUG_CONSOLE=true, 启动IGNITE的时候会自动弹出一个h2 console的浏览器, 能够看到创建的索引和具体的数据
   参考 https://apacheignite.readme.io/docs/sql-performance-and-debugging
   客户端程序能够加 System.setProperty("IGNITE_QUIET", "false");

2. SqlFieldsQuery query = new SqlFieldsQuery("explain [original query]") 能够看到SQL执行计划,主要是索引的使用

3. JMX jconsole 能够看到CACHE的基本信息，JMXBean名字是：org.apache.[cacheId].[gridName].[cacheName] 内存的使用状况： org.apache.[cacheId].MemoryMetrics 须要设置IGNITE_JMX_PORT

4. 远程DEBUG 修改ignite.bat/ignite.sh 中的 JVM_OPTS:
   set JVM_OPTS=-Xms1g -Xmx1g -server -XX:+AggressiveOpts -XX:MaxMetaspaceSize=256m -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=9527

5. 日志级别调整 IGNITE 支持 log4j, log4j2， slf 等等，须要将[ignite_home]/libs/optional目录下的ignite-log4j,ignite-log4j2或者ignite-slf4j 复制到libs目录下, 而后修改spring 配置文件:

   <bean class="org.apache.ignite.configuration.IgniteConfiguration">
       <property name="gridLogger">
           <bean class="org.apache.ignite.logger.log4j.Log4JLogger">
               <constructor-arg type="java.lang.String" value="log4j.xml"/>
           </bean>
   
           <bean class="org.apache.ignite.logger.log4j2.Log4J2Logger">
               <constructor-arg type="java.lang.String" value="log4j2.xml"/>
           </bean>
       </property>
       <!-- Other Ignite configurations -->
       ...
   </bean>

   默认使用了java.util.log [ignite_home]/config/java.util.logging.properties. 日志记录在[ignite_home]\work\log\下. 参考：https://apacheignite.readme.io/docs/logging

核心日志：
查询：
客户端 IgniteH2Indexing.queryDistributedSqlFields

if (log.isDebugEnabled())
         log.debug("Parsed query: `" + sqlQry + "` into two step query: " + twoStepQry);

服务端 GridQueryProcessor.store

if (log.isDebugEnabled())
            log.debug("Store [cache=" + cacheName + ", key=" + key + ", val=" + val + "]");

REBALANCE：
服务端 GridDhtPartitionSupplier.handleDemandMessage

if (log.isDebugEnabled())
            log.debug("Starting supplying rebalancing [cache=" + grp.cacheOrGroupName() + ", fromNode=" + node.id() + ", partitionsCount=" + d.partitions().size() + ", topology=" + d.topologyVersion() + ", updateSeq=" + d.updateSequence() + ", idx=" + idx + "]");

if (log.isDebugEnabled())
             log.debug("Finished supplying rebalancing [cache=" + grp.cacheOrGroupName() + ", fromNode=" + node.id() + ", topology=" + d.topologyVersion() + ", updateSeq=" + d.updateSequence() + ", idx=" + idx + "]");

NETWORK:

org.apache.ignite.internal.util.nio.GridTcpNioCommunicationClient 
org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi