[TAJO-1753] GlobalEngine causes NPE occurs occasionally

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.11.0
• Fix Version/s: 0.12.0, 0.11.1
• Component/s: Metrics
• Assignee: Jinho Kim
• Reporter: Jinho Kim
• Created: 12/Aug/15 08:12
• Updated: 30/Nov/15 08:38
• Resolved: 30/Nov/15 07:25

Description

tpch100> select count(*) from nation;
ERROR: internal error: %s

15-08-12 17:02:59,984 INFO org.apache.tajo.master.GlobalEngine: Query: select count(*) from nation
2015-08-12 17:02:59,988 ERROR org.apache.tajo.master.GlobalEngine:
Stack Trace:
java.lang.NullPointerException
        at org.apache.tajo.master.GlobalEngine.executeQuery(GlobalEngine.java:185)
        at org.apache.tajo.master.TajoMasterClientService$TajoMasterClientProtocolServiceHandler.submitQuery(TajoMasterClientService.java:304)
        at org.apache.tajo.ipc.TajoMasterClientProtocol$TajoMasterClientProtocolService$2.callBlockingMethod(TajoMasterClientProtocol.java:659)
        at org.apache.tajo.rpc.BlockingRpcServer$ServerHandler.channelRead0(BlockingRpcServer.java:100)
        at org.apache.tajo.rpc.BlockingRpcServer$ServerHandler.channelRead0(BlockingRpcServer.java:61)
        at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)
        at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:244)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)
        at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
        at org.apache.tajo.rpc.MonitorServerHandler.channelRead(MonitorServerHandler.java:70)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
        at java.lang.Thread.run(Thread.java:745)

2015-08-12 17:02:59,988 ERROR org.apache.tajo.master.TajoMasterClientService: