exception when using java SQL client

amitca71 — Sun, 14 May 2023 13:00:43 GMT

Hi,

I try to use java sql. i can see that the query on databricks is executed properly.

However, on my client i get exception (see below).

versions:

jdk: jdk-20.0.1 (tryed also with version 16, same results)

https://www.oracle.com/il-en/java/technologies/downloads/#jdk20-mac

<groupId>com.databricks</groupId>

<artifactId>databricks-jdbc</artifactId>

</dependency>

(other versions were also given same error)

-javaagent:/Applications/IntelliJ IDEA CE.app/Contents/lib/idea_rt.jar=64814:/Applications/IntelliJ IDEA CE.app/Contents/bin -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath /Users/amitca/technology/databrickssql/target/classes:/Users/amitca/.m2/repository/com/databricks/databricks-jdbc/2.6.33/databricks-jdbc-2.6.33.jar org.example.Main

WARNING: sun.reflect.Reflection.getCallerClass is not supported. This will impact performance.

java.sql.SQLException: [Databricks][DatabricksJDBCDriver](500540) Error caught in BackgroundFetcher. Foreground thread ID: 1. Background thread ID: 37. Error caught: null.

at com.databricks.client.hivecommon.dataengine.BackgroundFetcher.run(Unknown Source)

at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:577)

at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)

Caused by: com.databricks.client.support.exceptions.GeneralException: [Databricks][DatabricksJDBCDriver](500540) Error caught in BackgroundFetcher. Foreground thread ID: 1. Background thread ID: 37. Error caught: null.

... 5 more

Caused by: java.lang.ExceptionInInitializerError

at com.databricks.client.jdbc42.internal.apache.arrow.memory.ArrowBuf.getDirectBuffer(ArrowBuf.java:228)

at com.databricks.client.jdbc42.internal.apache.arrow.memory.ArrowBuf.nioBuffer(ArrowBuf.java:223)

at com.databricks.client.jdbc42.internal.apache.arrow.vector.ipc.ReadChannel.readFully(ReadChannel.java:87)

at com.databricks.client.jdbc42.internal.apache.arrow.vector.ipc.message.MessageSerializer.readMessageBody(MessageSerializer.java:727)

at com.databricks.client.jdbc42.internal.apache.arrow.vector.ipc.message.MessageSerializer.deserializeRecordBatch(MessageSerializer.java:363)

at com.databricks.client.spark.arrow.ArrowBuffer.deserializeBatch(Unknown Source)

at com.databricks.client.spark.arrow.ArrowBuffer.handleInitializeBuffer(Unknown Source)

at com.databricks.client.hivecommon.api.HiveServer2BaseBuffer.initializeBuffer(Unknown Source)

at com.databricks.client.hivecommon.api.RowsetBuffer.initializeBuffer(Unknown Source)

at com.databricks.client.hivecommon.api.HS2Client.getRowSetInformation(Unknown Source)

at com.databricks.client.hivecommon.api.HS2Client.fetchFromServer(Unknown Source)

at com.databricks.client.spark.jdbc.DowloadableFetchClient.fetchNRows(Unknown Source)

at com.databricks.client.hivecommon.api.HS2Client.fetchRows(Unknown Source)

at com.databricks.client.hivecommon.dataengine.BackgroundFetcher.run(Unknown Source)

at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:577)

at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)

at java.base/java.lang.Thread.run(Thread.java:1623)

Caused by: java.lang.RuntimeException: Failed to initialize MemoryUtil.

at com.databricks.client.jdbc42.internal.apache.arrow.memory.util.MemoryUtil.<clinit>(MemoryUtil.java:136)

... 19 more

Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field long java.nio.Buffer.address accessible: module java.base does not "opens java.nio" to unnamed module @5a9d6f02

at java.base/java.lang.reflect.AccessibleObject.throwInaccessibleObjectException(AccessibleObject.java:387)

at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:363)

at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:311)

at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:181)

at java.base/java.lang.reflect.Field.setAccessible(Field.java:175)

at com.databricks.client.jdbc42.internal.apache.arrow.memory.util.MemoryUtil.<clinit>(MemoryUtil.java:84)

... 19 more

Any idea?

Thanks.

Amit

Re: exception when using java SQL client

Debayan — Mon, 15 May 2023 16:25:12 GMT

Hi, Could you please clarify when you say your client is it the tool in your local system?

Please tag @Debayan with your next comment so that I will get notified. Thank you!

Re: exception when using java SQL client

amitca71 — Wed, 28 Jun 2023 07:53:38 GMT

it was java version issue (i work on mac).

didnt work with openjdk20

did work with adoptopenjdk-8.jdk

Re: exception when using java SQL client

ameyabapat — Thu, 20 Jul 2023 07:48:54 GMT

I am getting same error. I have added

'--add-opens=java.base/java.nio=ALL-UNNAMED'

in jvmargs and using java

openjdk 17 2021-09-14
OpenJDK Runtime Environment (build 17+35-2724)
OpenJDK 64-Bit Server VM (build 17+35-2724, mixed mode, sharing)
Any solution?

Re: exception when using java SQL client

yashpandhare — Mon, 16 Oct 2023 07:58:45 GMT

How do I add this same jvmarg into pom.xml ?

I tried adding through surefire-plugin but it does not take the arg. can you please help.

Re: exception when using java SQL client

xebia — Fri, 19 Apr 2024 10:37:07 GMT

I am using java 17 and getting the same error.

Re: exception when using java SQL client

Koteswara — Thu, 06 Feb 2025 09:32:22 GMT

Even I am facing same issue with java 17. Please suggest

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