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Weakly reference Activity for transaction finished callback #2203

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merged 5 commits into from
Aug 3, 2022
Merged

Weakly reference Activity for transaction finished callback #2203

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edb6596
Weakly reference Activity for transaction finished callback
adinauer Aug 3, 2022
bb098f5
Add changelog
adinauer Aug 3, 2022
544709c
Actually use weakRef
adinauer Aug 3, 2022
1b171c6
CR
adinauer Aug 3, 2022
8946e0f
Merge branch 'main' into feat/fix-activity-leak
adinauer Aug 3, 2022
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12 changes: 10 additions & 2 deletions sentry-android-core/src/main/java/io/sentry/android/core/ActivityLifecycleIntegration.java
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@
import io.sentry.util.Objects;
import java.io.Closeable;
import java.io.IOException;
import java.lang.ref.WeakReference;
import java.util.Date;
import java.util.List;
import java.util.Map;
Expand Down Expand Up @@ -146,6 +147,7 @@ private void stopPreviousTransactions() {
}

private void startTracing(final @NotNull Activity activity) {
WeakReference<Activity> weakActivity = new WeakReference<>(activity);
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Please try to reproduce the issue with and without the fix using LeakCanary.
Upgrade leakcanary to the latest version -> https://github.com/square/leakcanary/releases/tag/v2.9.1

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Tried with 2.9.1 but it didn't find anything regardless of WeakReference or old implementation.

if (performanceEnabled && !isRunningTransaction(activity) && hub != null) {
// as we allow a single transaction running on the bound Scope, we finish the previous ones
stopPreviousTransactions();
Expand All @@ -167,7 +169,10 @@ private void startTracing(final @NotNull Activity activity) {
(Date) null,
true,
(finishingTransaction) -> {
activityFramesTracker.setMetrics(activity, finishingTransaction.getEventId());
@Nullable Activity unwrappedActivity = weakActivity.get();
if (unwrappedActivity != null) {
activityFramesTracker.setMetrics(activity, finishingTransaction.getEventId());
}
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I'd log in to the else branch, so people know why frames were not attached in this case.

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Updated

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image

is still use activity , replace by unwrappedActivity?

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I think you looked at some old version of the code in this PR. It's using the unwrappedActivity now. I unintentionally commited the code I played around with to confirm the fix and then fixed with another commit.

});
} else {
// start transaction with app start timestamp
Expand All @@ -178,7 +183,10 @@ private void startTracing(final @NotNull Activity activity) {
appStartTime,
true,
(finishingTransaction) -> {
activityFramesTracker.setMetrics(activity, finishingTransaction.getEventId());
@Nullable Activity unwrappedActivity = weakActivity.get();
if (unwrappedActivity != null) {
activityFramesTracker.setMetrics(activity, finishingTransaction.getEventId());
}
});
// start specific span for app start

Expand Down