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fix: use PROFILER_STOP_COMMAND in Shutdown hook by maxday · Pull Request #537 · aws/aws-lambda-java-libs · GitHub

/ aws-lambda-java-libs Public

fix: use PROFILER_STOP_COMMAND in Shutdown hook #537

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Merged
maxday merged 1 commit into from
Mar 31, 2025
Conversation 1 Commits 1 Checks 0 Files changed
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fix: use PROFILER_STOP_COMMAND in Shutdown hook #537

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    • PreMain.java
    • ShutdownHook.java
6 changes: 3 additions & 3 deletions ...ava-profiler/extension/src/main/java/com/amazonaws/services/lambda/extension/PreMain.java
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,7 @@ public static void premain(String agentArgs, Instrumentation inst) {
if(!createFileIfNotExist("/tmp/aws-lambda-java-profiler")) {
Logger.debug("starting the profiler for coldstart");
startProfiler();
registerShutdownHook(AsyncProfiler.getInstance());
registerShutdownHook();
try {
Integer port = Integer.parseInt(INTERNAL_COMMUNICATION_PORT);
Logger.debug("using profile communication port = " + port);
Expand Down Expand Up @@ -101,9 +101,9 @@ public static void startProfiler() {
}
}

public static void registerShutdownHook(AsyncProfiler profiler) {
public static void registerShutdownHook() {
Logger.debug("registering shutdown hook");
Thread shutdownHook = new Thread(new ShutdownHook(profiler));
Thread shutdownHook = new Thread(new ShutdownHook(PROFILER_STOP_COMMAND));
Runtime.getRuntime().addShutdownHook(shutdownHook);
}

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8 changes: 4 additions & 4 deletions ...rofiler/extension/src/main/java/com/amazonaws/services/lambda/extension/ShutdownHook.java
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Original file line number Diff line number Diff line change
Expand Up @@ -6,10 +6,10 @@

public class ShutdownHook implements Runnable {

private AsyncProfiler profiler;
private String stopCommand;

public ShutdownHook(AsyncProfiler profiler) {
this.profiler = profiler;
public ShutdownHook(String stopCommand) {
this.stopCommand = stopCommand;
}

@Override
Expand All @@ -18,7 +18,7 @@ public void run() {
try {
final String fileName = "/tmp/profiling-data-shutdown.html";
Logger.debug("stopping the profiler");
AsyncProfiler.getInstance().execute(String.format("stop,file=%s,include=*AWSLambda.main,include=start_thread", fileName));
AsyncProfiler.getInstance().execute(String.format(this.stopCommand, fileName));
} catch (Exception e) {
Logger.error("could not stop the profiler");
}
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