ProcessMetrics seems not worked in javaagent default behave, manually instrument works well.

[domyway]

my app start with

-javaagent:"/path/to/opentelemetry-javaagent-1.10.1.jar"
-Dotel.javaagent.debug=true
-Dserver.port=8180
-Dotel.metrics.exporter=otlp
-Dotel.exporter.otlp.endpoint="http://127.0.0.1:4317"
-Dotel.experimental.sdk.metrics.debug=true

my pom.xml

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.2</version>
        <relativePath/> <!-- lookup parent from repository -->
 </parent>

<dependency>
      <groupId>io.opentelemetry.instrumentation</groupId>
      <artifactId>opentelemetry-oshi</artifactId>
      <version>1.10.1-alpha</version>
  </dependency>
  <dependency>
      <groupId>com.github.oshi</groupId>
      <artifactId>oshi-core</artifactId>
      <version>5.3.1</version>
  </dependency>

my collector receive all the metrics like this

# HELP promexample_runtime_jvm_gc_count The number of collections that have occurred for a given JVM garbage collector.
# TYPE promexample_runtime_jvm_gc_count counter

# HELP promexample_runtime_jvm_gc_time Time spent in a given JVM garbage collector in milliseconds.
# TYPE promexample_runtime_jvm_gc_time counter

# HELP promexample_runtime_jvm_memory_area Bytes of a given JVM memory area.
# TYPE promexample_runtime_jvm_memory_area gauge
blabla
# HELP promexample_runtime_jvm_memory_pool Bytes of a given JVM memory pool.
# TYPE promexample_runtime_jvm_memory_pool gauge
blabla
# HELP promexample_system_disk_io System disk IO
# TYPE promexample_system_disk_io counter
blabla
# HELP promexample_system_disk_operations System disk operations
# TYPE promexample_system_disk_operations counter
blabla
# HELP promexample_system_memory_usage System memory usage
# TYPE promexample_system_memory_usage gauge
blabla
# HELP promexample_system_memory_utilization System memory utilization
# TYPE promexample_system_memory_utilization gauge
blabla
# HELP promexample_system_network_errors System network errors
# TYPE promexample_system_network_errors counter
blabla
# HELP promexample_system_network_io System network IO
# TYPE promexample_system_network_io counter
blabla
# HELP promexample_system_network_packets System network packets
# TYPE promexample_system_network_packets counter

ProcessMetrics is missing.

But When I disable the javaagent oshi, manually code like this :

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import io.opentelemetry.instrumentation.oshi.ProcessMetrics;
import io.opentelemetry.instrumentation.oshi.SystemMetrics;
@SpringBootApplication
public class DemoApplication {
    static {
        ProcessMetrics.registerObservers();
        SystemMetrics.registerObservers();
    }

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

and the add -Dotel.instrumentation.oshi.enabled=false

my collector receive the ProcessMetrics:

# HELP promexample_runtime_java_cpu_time Runtime Java CPU time
# TYPE promexample_runtime_java_cpu_time gauge
blabla
# HELP promexample_runtime_java_memory Runtime Java memory
# TYPE promexample_runtime_java_memory gauge
blabla
# HELP promexample_runtime_jvm_gc_count The number of collections that have occurred for a given JVM garbage collector.
# TYPE promexample_runtime_jvm_gc_count counter
blabla
# HELP promexample_runtime_jvm_gc_time Time spent in a given JVM garbage collector in milliseconds.
# TYPE promexample_runtime_jvm_gc_time counter
blabla
# HELP promexample_runtime_jvm_memory_area Bytes of a given JVM memory area.
# TYPE promexample_runtime_jvm_memory_area gauge
blabla
# HELP promexample_runtime_jvm_memory_pool Bytes of a given JVM memory pool.
# TYPE promexample_runtime_jvm_memory_pool gauge
blabla
# HELP promexample_system_disk_io System disk IO
# TYPE promexample_system_disk_io counter
blabla
# HELP promexample_system_disk_operations System disk operations
# TYPE promexample_system_disk_operations counter
blabla
# HELP promexample_system_memory_usage System memory usage
# TYPE promexample_system_memory_usage gauge
blabla
# HELP promexample_system_memory_utilization System memory utilization
# TYPE promexample_system_memory_utilization gauge
blabla
# HELP promexample_system_network_errors System network errors
# TYPE promexample_system_network_errors counter
blabla
# HELP promexample_system_network_io System network IO
# TYPE promexample_system_network_io counter
blabla
# HELP promexample_system_network_packets System network packets
# TYPE promexample_system_network_packets counter

and I do somethine wrong ?