No longer send event / transaction to Sentry if beforeSend / beforeSendTransaction throws

CHANGELOG.md

@@ -9,6 +9,7 @@
 ### Fixes
 
 - Deprecate reportFullDisplayed in favor of reportFullyDisplayed ([#2585](https://github.com/getsentry/sentry-java/pull/2585))
+- No longer send event / transaction to Sentry if `beforeSend` / `beforeSendTransaction` throws ([#2591](https://github.com/getsentry/sentry-java/pull/2591))
 
 ## 6.15.0
 

sentry/src/main/java/io/sentry/SentryClient.java

@@ -705,15 +705,8 @@ private void sortBreadcrumbsByDate(
                 "The BeforeSend callback threw an exception. It will be added as breadcrumb and continue.",
                 e);
 
-        final Breadcrumb breadcrumb = new Breadcrumb();
-        breadcrumb.setMessage("BeforeSend callback failed.");
-        breadcrumb.setCategory("SentryClient");
-        breadcrumb.setLevel(SentryLevel.ERROR);
-        if (e.getMessage() != null) {
-          breadcrumb.setData("sentry:message", e.getMessage());
-        }
-
-        event.addBreadcrumb(breadcrumb);
+        // drop event in case of an error in beforeSend due to PII concerns
+        event = null;
       }
     }
     return event;
@@ -734,15 +727,8 @@ private void sortBreadcrumbsByDate(
                 "The BeforeSendTransaction callback threw an exception. It will be added as breadcrumb and continue.",
                 e);
 
-        final Breadcrumb breadcrumb = new Breadcrumb();
-        breadcrumb.setMessage("BeforeSendTransaction callback failed.");
-        breadcrumb.setCategory("SentryClient");
-        breadcrumb.setLevel(SentryLevel.ERROR);
-        if (e.getMessage() != null) {
-          breadcrumb.setData("sentry:message", e.getMessage());
-        }
-
-        transaction.addBreadcrumb(breadcrumb);
+        // drop transaction in case of an error in beforeSend due to PII concerns
+        transaction = null;
       }
     }
     return transaction;

sentry/src/test/java/io/sentry/SentryClientTest.kt

@@ -194,21 +194,21 @@ class SentryClientTest {
     }
 
     @Test
-    fun `when beforeSend throws an exception, breadcrumb is added and event is sent`() {
+    fun `when beforeSend throws an exception, event is dropped`() {
         val exception = Exception("test")
 
         exception.stackTrace.toString()
         fixture.sentryOptions.setBeforeSend { _, _ -> throw exception }
         val sut = fixture.getSut()
         val actual = SentryEvent()
-        sut.captureEvent(actual)
+        val id = sut.captureEvent(actual)
 
-        assertNotNull(actual.breadcrumbs) {
-            assertEquals("test", it.first().data["sentry:message"])
-            assertEquals("SentryClient", it.first().category)
-            assertEquals(SentryLevel.ERROR, it.first().level)
-            assertEquals("BeforeSend callback failed.", it.first().message)
-        }
+        assertEquals(SentryId.EMPTY_ID, id)
+
+        assertClientReport(
+            fixture.sentryOptions.clientReportRecorder,
+            listOf(DiscardedEvent(DiscardReason.BEFORE_SEND.reason, DataCategory.Error.category, 1))
+        )
     }
 
     @Test
@@ -808,21 +808,21 @@ class SentryClientTest {
     }
 
     @Test
-    fun `when beforeSendTransaction throws an exception, breadcrumb is added and event is sent`() {
+    fun `when beforeSendTransaction throws an exception, transaction is dropped`() {
         val exception = Exception("test")
 
         exception.stackTrace.toString()
         fixture.sentryOptions.setBeforeSendTransaction { _, _ -> throw exception }
 
         val transaction = SentryTransaction(fixture.sentryTracer)
-        fixture.getSut().captureTransaction(transaction, fixture.sentryTracer.traceContext())
+        val id = fixture.getSut().captureTransaction(transaction, fixture.sentryTracer.traceContext())
 
-        assertNotNull(transaction.breadcrumbs) {
-            assertEquals("test", it.first().data["sentry:message"])
-            assertEquals("SentryClient", it.first().category)
-            assertEquals(SentryLevel.ERROR, it.first().level)
-            assertEquals("BeforeSendTransaction callback failed.", it.first().message)
-        }
+        assertEquals(SentryId.EMPTY_ID, id)
+
+        assertClientReport(
+            fixture.sentryOptions.clientReportRecorder,
+            listOf(DiscardedEvent(DiscardReason.BEFORE_SEND.reason, DataCategory.Transaction.category, 1))
+        )
     }
 
     @Test