[jira] [Created] (FLINK-8272) 1.4 & Scala: Exception when querying the state

["Juan Miguel Cejuela (JIRA)" <ji...@apache.org>]

Juan Miguel Cejuela created FLINK-8272:
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             Summary: 1.4 & Scala: Exception when querying the state
                 Key: FLINK-8272
                 URL: https://issues.apache.org/jira/browse/FLINK-8272
             Project: Flink
          Issue Type: Bug
          Components: Queryable State
    Affects Versions: 1.4.0
         Environment: mac
            Reporter: Juan Miguel Cejuela


With Flink 1.3.2 and basically the same code except for the changes in the API that happened in 1.4.0, I could query the state finely.

With 1.4.0 (& scala), I get the exception written below. Most important line: {{java.util.concurrent.CompletionException: java.lang.IndexOutOfBoundsException: readerIndex(0) + length(4) exceeds writerIndex(0): PooledUnsafeDirectByteBuf(ridx: 0, widx: 0, cap: 0)}}

Somehow it seems that the connection to the underlying buffer fails. Perhaps most informing is that, if I give a wrong {{JobId}} (i.e. one that is not running), I still get the same error. So I guess no connection succeeds. Also, to avoid possible serialization errors, I am just querying with a type {{String}} and, for testing, a dummy & trivial {{case class}}.

I create the necessary types such as:

{{implicit val typeInformationString = createTypeInformation[String]
implicit val typeInformationDummy = createTypeInformation[Dummy]

implicit val valueStateDescriptorDummy =
    new ValueStateDescriptor("state", typeInformationDummy)}}

And then query the like such as:

{{val javaCompletableFuture = client
        .getKvState(this.flinkJobIdObject, this.queryableState, key, typeInformationString, valueStateDescriptorDummy)}}

Does anybody have any clue on this? Let me know what other information I should provide.

---

Full stack trace:

{{java.util.concurrent.CompletionException: java.lang.IndexOutOfBoundsException: readerIndex(0) + length(4) exceeds writerIndex(0): PooledUnsafeDirectByteBuf(ridx: 0, widx: 0, cap: 0)
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:292)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:308)
	at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:593)
	at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
	at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
	at java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
	at org.apache.flink.queryablestate.network.Client$PendingConnection.lambda$handInChannel$0(Client.java:289)
	at java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:760)
	at java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:736)
	at java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:474)
	at java.util.concurrent.CompletableFuture.completeExceptionally(CompletableFuture.java:1977)
	at org.apache.flink.queryablestate.network.Client$EstablishedConnection.close(Client.java:432)
	at org.apache.flink.queryablestate.network.Client$EstablishedConnection.onFailure(Client.java:505)
	at org.apache.flink.queryablestate.network.ClientHandler.channelRead(ClientHandler.java:92)
	at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
	at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
	at org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
	at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
	at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
	at org.apache.flink.shaded.netty4.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:242)
	at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
	at org.apache.flink.shaded.netty4.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
	at org.apache.flink.shaded.netty4.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:847)
	at org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
	at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
	at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
	at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
	at org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
	at org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(0) + length(4) exceeds writerIndex(0): PooledUnsafeDirectByteBuf(ridx: 0, widx: 0, cap: 0)
	at org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1166)
	at org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBuf.readInt(AbstractByteBuf.java:619)
	at org.apache.flink.queryablestate.network.messages.MessageSerializer.deserializeHeader(MessageSerializer.java:231)
	at org.apache.flink.queryablestate.network.ClientHandler.channelRead(ClientHandler.java:76)
	... 16 common frames omitted}}



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