From ea165f2c67bc554dd75ae8c6e320874c60ee0228 Mon Sep 17 00:00:00 2001
From: shahoian <ruben.shahoyan@cern.ch>
Date: Fri, 14 Mar 2025 16:21:22 +0100
Subject: [PATCH] Fix round-robin reading in DigitizationContext::retrieveHits

---
 .../include/SimulationDataFormat/DigitizationContext.h        | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/DataFormats/simulation/include/SimulationDataFormat/DigitizationContext.h b/DataFormats/simulation/include/SimulationDataFormat/DigitizationContext.h
index 5e1f5f66b3f65..b718b2d5eb804 100644
--- a/DataFormats/simulation/include/SimulationDataFormat/DigitizationContext.h
+++ b/DataFormats/simulation/include/SimulationDataFormat/DigitizationContext.h
@@ -218,6 +218,10 @@ inline void DigitizationContext::retrieveHits(std::vector<TChain*> const& chains
     return;
   }
   br->SetAddress(&hits);
+  auto maxEntries = br->GetEntries();
+  if (maxEntries) {
+    entryID %= maxEntries;
+  }
   br->GetEntry(entryID);
 }