Exception in thread "main" java.lang.NullPointerException

[sigezhao]

I run btrace in k8s pod and met the following error:
./btrace -u 9 ../samples/AllCalls1.java （9 is target process's pid, AllCalls1.java is source file name）
btrace INFO: Attaching BTrace to PID: 9
Exception in thread "main" java.lang.NullPointerException
at org.openjdk.btrace.compiler.Compiler.(Compiler.java:66)
at org.openjdk.btrace.compiler.Compiler.(Compiler.java:71)
at org.openjdk.btrace.client.Client.compile(Client.java:208)
at org.openjdk.btrace.client.Client.compile(Client.java:193)
at org.openjdk.btrace.client.Main.main(Main.java:239)

I've search similar issue in the issues search box,but it didn't fix my problem;Can you help me out?

Enviroment information:

Java version:

java -version
openjdk version "1.8.0_111"
OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-2~bpo8+1-b14)
OpenJDK 64-Bit Server VM (build 25.111-b14, mixed mode)

brace version:

./btrace --version
BTrace v.2.2.2 (c8f81cc)

scritp content

cat ../samples/AllCalls1.java
....
@btrace
public class AllCalls1 {
@OnMethod(clazz = "demo.tcloud.triblewood.qcbm.favorites.service.FavoriteServiceImpl", method = "/./",
location = @location(value = Kind.CALL, clazz = "/./", method = "/.*/"))
public static void m(@self Object self, @TargetMethodOrField String method, @ProbeMethodName String probeMethod) { // all calls to the methods with signature "()"
println(method + " in " + probeMethod);
}
}

target method file

https://github.com/TencentCloud/container-demo/blob/main/qcbm/qcbm-backend/favorites-service/src/main/java/demo/tcloud/triblewood/qcbm/favorites/service/FavoriteServiceImpl.java

tools.jar

tools.jar is from:https://github.com/Tencent/TencentKona-8/releases/download/8.0.10-GA/TencentKona8.0.10.b1_jdk_linux-x86_64_8u332.tar.gz

[jbachorik]

It is indeed the tools.jar related issue. Are you sure you put the jar in the correct place? The required location is $JAVA_HOME/lib/tools.jar.

If the things are not working even after the jar file is in the correct place you could compile the script on a machine with full JDK with btracec command and then use the compiled version in btrace ... command.

[github-actions]

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