Unify the identity of a process while logging. (#2325)

java/pom.xml

@@ -74,10 +74,6 @@
                 <artifactId>jedis</artifactId>
                 <version>2.8.0</version>
             </dependency>
-            <dependency>
-                <groupId>org.apache.arrow</groupId>
-                <artifactId>arrow-plasma</artifactId>
-            </dependency>
 
             <dependency>
                 <groupId>commons-io</groupId>

java/runtime-native/src/main/java/org/ray/runner/RunManager.java

@@ -397,7 +397,7 @@ public class RunManager {
       for (int j = 0; j < runInfo.allProcesses.get(i).size(); ) {
         p = runInfo.allProcesses.get(i).get(j);
         if (!p.process.isAlive()) {
-          RayLog.core.error("Process " + p.hashCode() + " is not alive!" + " Process Type "
+          RayLog.core.error("Process " + p.process.hashCode() + " is not alive!" + " Process Type "
               + types[i].name());
           runInfo.deadProcess.add(p);
           runInfo.allProcesses.get(i).remove(j);
@@ -454,7 +454,7 @@ public class RunManager {
       if (killAll) {
         runInfo.allProcesses.get(i).forEach(p -> {
           if (killProcess(p.process)) {
-            RayLog.core.info("Kill process " + p.hashCode() + " forcely");
+            RayLog.core.info("Kill process " + p.process.hashCode() + " forcely");
           }
         });
       } else {