IGNITE TROUBLESHOOT

H2 Console sets the system variable set IGNITE_H2_DEBUG_CONSOLE=true, and when you start IGNITE, an h3 console browser pops up automatically, and you can see the established index and specific data.

Reference https://apacheignite.readme.io/docs/sql-performance-and-debugging

Client programs can add System.setProperty ("IGNITE_QUIET", "false")

SqlFieldsQuery query = new SqlFieldsQuery ("explain [original query]") you can see the SQL execution plan, mainly the use of the index

JMX jconsole can see the basic information of CACHE. The name of JMXBean is: org.apache.[ cacheId] .[ gridName] .memory usage: org.apache.[ cacheId] .memoryMetrics needs to set IGNITE_JMX_PORT.

The remote DEBUG modifies the JVM_OPTS in ignite.bat/ignite.sh:

Set JVM_OPTS=-Xms1g-Xmx1g-server-XX:+AggressiveOpts-XX:MaxMetaspaceSize=256m-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=9527

Log level adjustment IGNITE supports log4j, log4j2, slf, etc. You need to copy the ignite-log4j,ignite-log4j2 or ignite-slf4j under the [ignite_home] / libs/optional directory to the libs directory, and then modify the spring configuration file:

...

Java.util.log [ignite_home] / config/java.util.logging.properties. The log is recorded under [ignite_home]\ work\ log\. Reference: https://apacheignite.readme.io/docs/logging

Core log:

Query:

Client IgniteH2Indexing.queryDistributedSqlFields

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

Server GridQueryProcessor.store

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

REBALANCE:

Server 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