Thanks, Matt it seems that it is the only way to solve this then...
i added an environment variable named "_JAVA_OPTIONS", (which may be a bad practice) and gave its value "--add-opens=java.base/java.lang=ALL-UNNAMED" after then, apps started successfully. i also noticed that shell executables in bin folder may need more privileges to access old apis. i added "--add-exports=java.base/sun.net.util=ALL-UNNAMED" for flink-console.sh. Best regards, Bill 发件人: Matt Wang <wang...@163.com> 发送时间: 2023年8月29日 20:16 收件人: Xu Bill <xuzhili1...@hotmail.com> 主题: Re:InaccessibleObjectException issue Hi Bill For version 1.17.1, you can use JDK11 to submit jobs[1], and JDK17 support starts from 1.18.0[2]. If you want to run with JDK17 now, you need to add some JDK configuration[3] 1. https://nightlies.apache.org/flink/flink-docs-stable/docs/try-flink/local_installation/#downloading-flink 2. https://issues.apache.org/jira/browse/FLINK-15736 3. https://stackoverflow.com/questions/68117860/eclipse-2021-06-classformaterror-accessible-module-java-base-does-not-opens-j -- Best, Matt Wang ---- Replied Message ---- From Xu Bill<xuzhili1...@hotmail.com> Date 08/29/2023 17:49 To u...@flink.apache.org<u...@flink.apache.org> Subject InaccessibleObjectException issue Hello, I'm new to Apache Flink. I followed the instrunctions to run examples after installation (as described here: https://nightlies.apache.org/flink/flink-docs-stable/docs/try-flink/local_installation/#submitting-a-flink-job) and also tried running an example java app (as described here: https://nightlies.apache.org/flink/flink-docs-release-1.17/docs/learn-flink/datastream_api/) But both of them failed to start and gave me same error as below: Exception in thread "main" java.lang.reflect.InaccessibleObjectException: Unable to make field private final byte[] java.lang.String.value accessible: module java.base does not "opens java.lang" to unnamed module @4ac3c60d at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357) at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297) at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:177) at java.base/java.lang.reflect.Field.setAccessible(Field.java:171) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:106) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:132) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:132) at org.apache.flink.api.java.ClosureCleaner.clean(ClosureCleaner.java:69) at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.clean(StreamExecutionEnvironment.java:2317) at org.apache.flink.streaming.api.datastream.DataStream.clean(DataStream.java:202) at org.apache.flink.streaming.api.datastream.DataStream.addSink(DataStream.java:1244) at org.apache.flink.streaming.api.datastream.DataStream.print(DataStream.java:937) at test.flink.Example.main(Example.java:25) Could anybody help give a solution on this? I am using OpenJDK 17. openjdk version "17.0.1" 2021-10-19 OpenJDK Runtime Environment (build 17.0.1+12-39) OpenJDK 64-Bit Server VM (build 17.0.1+12-39, mixed mode, sharing) Best regards, Bill
