ArrayIndexOutOfBoundsException

[jelle...@gmail.com]

Hi all,

While upgrading Vert.x Redis Client from 4.5.9 to 4.5.10, a strange exception appears. A batch request on RedisStandaloneConnection fails to complete or fail the promise because of the following exception.

java.lang.ArrayIndexOutOfBoundsException: arraycopy: last destination index 37 out of bounds for byte[36]

at java.base/java.lang.String.getBytes(String.java:4726)

at java.base/java.lang.AbstractStringBuilder.putStringAt(AbstractStringBuilder.java:1751)

at java.base/java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:588)

at java.base/java.lang.StringBuilder.append(StringBuilder.java:179)

at io.vertx.redis.client.impl.RedisStandaloneConnection.lambda$doBatch$3(RedisStandaloneConnection.java:311)

at io.vertx.core.impl.future.FutureImpl$4.onFailure(FutureImpl.java:188)

at io.vertx.core.impl.future.FutureBase.lambda$emitFailure$1(FutureBase.java:75)

at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)

at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)

at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569)

at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:994)

at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)

at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)

at java.base/java.lang.Thread.run(Thread.java:1583)

It seems like this exception happens while manipulating the error message of the batch request on https://github.com/vert-x3/vertx-redis-client/blob/92f86cc7f5ed597a2b418ba6ac12ab6ee208d643/src/main/java/io/vertx/redis/client/impl/RedisStandaloneConnection.java#L311

It looks like nothing should be able to go wrong on this line (the connection is being used on the same context with the virtual threading model)

Any ideas?

[Ladislav Thon]

Hi,

that is indeed a strange exception. It almost looks like a bug in the JDK. What Java version do you use? If you could provide the full output of `java -version`, that would be best IMHO.

Thanks,

LT

čt 3. 10. 2024 v 9:18 odesílatel jelle...@gmail.com <jelle...@gmail.com> napsal:

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[jelle...@gmail.com]

That's also what it seemed to be for me, but seems strange that I would be the only one hitting that bug.

openjdk 21.0.4 2024-07-16
OpenJDK Runtime Environment (build 21.0.4+7-Ubuntu-1ubuntu224.04)
OpenJDK 64-Bit Server VM (build 21.0.4+7-Ubuntu-1ubuntu224.04, mixed mode, sharing)