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[fix] Avoid negative estimated entry count #24055

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[fix] Avoid negative estimated entry count #24055

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b4f82f0
avoid negative estimate entry count
gaoran10 Mar 5, 2025
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gaoran10 Mar 5, 2025
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gaoran10 Mar 6, 2025
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gaoran10 Mar 6, 2025
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8 changes: 5 additions & 3 deletions managed-ledger/src/main/java/org/apache/bookkeeper/mledger/impl/ManagedCursorImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3811,9 +3811,11 @@ public int applyMaxSizeCap(int maxEntries, long maxSizeBytes) {
if (maxSizeBytes == NO_MAX_SIZE_LIMIT) {
return maxEntries;
}
int maxEntriesBasedOnSize =
Long.valueOf(estimateEntryCountBySize(maxSizeBytes, readPosition, ledger)).intValue();
return Math.min(maxEntriesBasedOnSize, maxEntries);
long estimatedEntryCount = estimateEntryCountBySize(maxSizeBytes, readPosition, ledger);
if (estimatedEntryCount > Integer.MAX_VALUE) {
return maxEntries;
}
return Math.min((int) estimatedEntryCount, maxEntries);
}

static long estimateEntryCountBySize(long bytesSize, Position readPosition, ManagedLedgerImpl ml) {
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10 changes: 10 additions & 0 deletions managed-ledger/src/test/java/org/apache/bookkeeper/mledger/impl/ManagedCursorTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5246,6 +5246,16 @@ public void testEstimateEntryCountBySize() throws Exception {
ml.delete();
}

@Test
public void testApplyMaxSizeCap() throws Exception {
var ml = factory.open("testApplyMaxSizeCap");
var cursor = ml.openCursor("c1");
ml.addEntry(new byte[1000]);
assertEquals(cursor.applyMaxSizeCap(200, Long.MAX_VALUE), 200);
ml.deleteCursor("c1");
ml.delete();
}

@Test
void testForceCursorRecovery() throws Exception {
TestPulsarMockBookKeeper bk = new TestPulsarMockBookKeeper(executor);
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