For general reference I believe NoClassDefFoundError also occurs when the static initialization block of the required class fails to initialize. In general, it's best to wrap any static initialization block with a failure catch that prints/logs the issues before throwing so you aren't struggling like this. We should open a ticket to make this change if we a place where that isn't happening. It looks like MemoryUtil's initialization block doesn't handle this. (It tries to throw.) I believe that in some cases (all cases?) those throws are swallowed and the NoClassDefFoundError is thrown instead.
On Mon, Jul 18, 2022 at 1:22 PM David Dali Susanibar Arce < [email protected]> wrote: > Hi Olo, > > Please if you could try to execute your project by command line (main > class name example: TestMyFlightConsumer) > > $ cd <wks> > $ export > JAVA_HOME=/Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home > $ java --version > openjdk 17.0.3 2022-04-19 LTS > OpenJDK Runtime Environment Zulu17.34+19-CA (build 17.0.3+7-LTS) > OpenJDK 64-Bit Server VM Zulu17.34+19-CA (build 17.0.3+7-LTS, mixed mode, > sharing) > $ mvn -q dependency:build-classpath -DincludeTypes=jar > -Dmdep.outputFile=localtest.cp.tmp > $ javac --add-opens=java.base/java.nio=ALL-UNNAMED > src/main/java/TestMyFlightConsumer.java --class-path `cat > localtest.cp.tmp`:target/classes > $ java --add-opens=java.base/java.nio=ALL-UNNAMED --class-path `cat > localtest.cp.tmp`:target/classes TestMyFlightConsumer > > Please let us know what errors you see now. > > David > > El lun, 18 jul 2022 a las 12:41, Olo Sawyerr (<[email protected]>) > escribió: > >> Hi, >> >> I'm using Java 17. But compiled to target JDK 11 binary. >> >> /Users/olo/Library/Java/JavaVirtualMachines/azul-17.0.3/ >> >> Strange thing is that the *org.apache.arrow.memory.util.MemoryUtil *class >> appears in the debugger. But when it calls MemoryUtil.directBuffer(address, >> length) it gives the java.lang.NoClassDefFoundError >> >> Yes I'm also passing the flags - >> >> --add-opens=java.base/java.nio=ALL-UNNAMED >> >> Regards, >> >> Olo >> >> ------------------------------ >> *From:* David Li <[email protected]> >> *Sent:* 18 July 2022 18:01 >> *To:* dl <[email protected]> >> *Subject:* Re: [JAVA] java.lang.NoClassDefFoundError: Could not >> initialize class org.apache.arrow.memory.util.MemoryUtil >> >> Hi, >> >> It's specifically "could not initialize class", is there other output? >> >> Most likely I'd guess you're on Java 9+, are all the necessary flags >> passed to java to enable unsafe memory on this version? >> https://arrow.apache.org/docs/dev/java/install.html#java-compatibility >> <https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Farrow.apache.org%2Fdocs%2Fdev%2Fjava%2Finstall.html%23java-compatibility&data=05%7C01%7C%7C635738eb6d744d854e6d08da68df27ad%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637937604889560404%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=C%2BwgSBfq0kf%2BXP06shkWtcFgTSIq6%2BWDUCD29idt%2FtQ%3D&reserved=0> >> >> -David >> >> On Mon, Jul 18, 2022, at 12:56, Olo Sawyerr wrote: >> >> Hi, >> >> I'm trying to use arrow flight and keep getting this exception below when >> calling flightClient.getStream() - *java.lang.NoClassDefFoundError: >> Could not initialize class org.apache.arrow.memory.util.MemoryUtil* >> >> It's quite odd because I have *arrow-memory-core* defined in my pom. I'm >> using v8.0.0. Any ideas what this could be? I'm running this in IntelliJ. >> >> *Code:* >> >> try (var allocator = new RootAllocator(); var flightClient = >> FlightClient.*builder*(allocator, location).build()) { >> var flightStream = flightClient.getStream(ticket); >> if (flightStream.next()) { >> retval = flightStream.getRoot(); >> } >> } >> >> >> *StackTrace:* >> >> 2022-07-18T17:29:58.075+0100 INFO grpc-default-executor-11 stderr >> *java.lang.NoClassDefFoundError: >> Could not initialize class org.apache.arrow.memory.util.MemoryUtil* >> >> 2022-07-18T17:29:58.076+0100 INFO grpc-default-executor-11 stderr at >> org.apache.arrow.memory.ArrowBuf.getDirectBuffer(ArrowBuf.java:228) >> >> 2022-07-18T17:29:58.077+0100 INFO grpc-default-executor-11 stderr at >> org.apache.arrow.memory.ArrowBuf.nioBuffer(ArrowBuf.java:223) >> >> 2022-07-18T17:29:58.077+0100 INFO grpc-default-executor-11 stderr at >> org.apache.arrow.flight.grpc.GetReadableBuffer.readIntoBuffer(GetReadableBuffer.java:91) >> >> 2022-07-18T17:29:58.078+0100 INFO grpc-default-executor-11 stderr at >> org.apache.arrow.flight.ArrowMessage.frame(ArrowMessage.java:319) >> >> 2022-07-18T17:29:58.079+0100 INFO grpc-default-executor-11 stderr at >> org.apache.arrow.flight.ArrowMessage.access$100(ArrowMessage.java:68) >> >> 2022-07-18T17:29:58.079+0100 INFO grpc-default-executor-11 stderr at >> org.apache.arrow.flight.ArrowMessage$ArrowMessageHolderMarshaller.parse(ArrowMessage.java:551) >> >> 2022-07-18T17:29:58.079+0100 INFO grpc-default-executor-11 stderr at >> org.apache.arrow.flight.ArrowMessage$ArrowMessageHolderMarshaller.parse(ArrowMessage.java:536) >> >> 2022-07-18T17:29:58.079+0100 INFO grpc-default-executor-11 stderr at >> io.grpc.MethodDescriptor.parseResponse(MethodDescriptor.java:284) >> >> 2022-07-18T17:29:58.080+0100 INFO grpc-default-executor-11 stderr at >> io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1MessagesAvailable.runInternal(ClientCallImpl.java:661) >> >> 2022-07-18T17:29:58.080+0100 INFO grpc-default-executor-11 stderr at >> io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1MessagesAvailable.runInContext(ClientCallImpl.java:646) >> >> 2022-07-18T17:29:58.080+0100 INFO grpc-default-executor-11 stderr at >> io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37) >> >> 2022-07-18T17:29:58.081+0100 INFO grpc-default-executor-11 stderr at >> io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133) >> >> 2022-07-18T17:29:58.081+0100 INFO grpc-default-executor-11 stderr at >> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) >> >> 2022-07-18T17:29:58.081+0100 INFO grpc-default-executor-11 stderr at >> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) >> >> >>
