stephen mallette created TINKERPOP-2005:
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Summary: Intermittent NullPointerException in response handling
Key: TINKERPOP-2005
URL: https://issues.apache.org/jira/browse/TINKERPOP-2005
Project: TinkerPop
Issue Type: Improvement
Components: driver
Affects Versions: 3.2.9
Reporter: stephen mallette
This stacktrace was reported to me:
{code}
06:11:01 2018-07-05 13:11:01,706 ERROR 13:11:01,618 Could not process the
response
06:11:01 java.lang.NullPointerException: null
06:11:01 at
org.apache.tinkerpop.gremlin.driver.Handler$GremlinResponseHandler.lambda$channelRead0$39(Handler.java:220)
06:11:01 at java.util.ArrayList.forEach(ArrayList.java:1257)
06:11:01 at
org.apache.tinkerpop.gremlin.driver.Handler$GremlinResponseHandler.channelRead0(Handler.java:220)
06:11:01 at
org.apache.tinkerpop.gremlin.driver.Handler$GremlinResponseHandler.channelRead0(Handler.java:197)
06:11:01 at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
06:11:01 at
org.apache.tinkerpop.gremlin.driver.Handler$GremlinSaslAuthenticationHandler.channelRead0(Handler.java:123)
06:11:01 at
org.apache.tinkerpop.gremlin.driver.Handler$GremlinSaslAuthenticationHandler.channelRead0(Handler.java:67)
06:11:01 at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
06:11:01 at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
06:11:01 at
org.apache.tinkerpop.gremlin.driver.handler.WebSocketClientHandler.channelRead0(WebSocketClientHandler.java:94)
06:11:01 at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
06:11:01 at
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
06:11:01 at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
06:11:01 at
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
06:11:01 at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
06:11:01 at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
06:11:01 at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134)
06:11:01 at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644)
06:11:01 at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:579)
06:11:01 at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:496)
06:11:01 at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458)
06:11:01 at
io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
06:11:01 at java.lang.Thread.run(Thread.java:748)
{code}
Some initial investigation seems to indicate that it is intermittent and likely
some form of timing issue. Will probably be hard to recreate. Hesitant to just
make the problem go away without understanding why it is happening.
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