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Fix #1054: Extend ROOT 6.32 gDirectory workaround to ::Process #1058

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merged 1 commit into from
Oct 27, 2025
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Fix #1054: Extend ROOT 6.32 gDirectory workaround to ::Process #1058

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7 changes: 7 additions & 0 deletions src/programs/Analysis/hd_root/MyProcessor.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -152,6 +152,13 @@ void MyProcessor::BeginRun(const std::shared_ptr<const JEvent>& event)
//------------------------------------------------------------------
void MyProcessor::Process(const std::shared_ptr<const JEvent>& event)
{
// Manually set gDirectory to ROOTfile because its value is not propagated
// from the other threads (::Init/BeginRun) to the thread that runs ::Process.
// All JEventProcessors for an event run in the same thread, so setting this value here
// ensures that subsequent plugins see the correct gDirectory when their ::Process methods are called.
// This issue appeared after upgrading from ROOT 6.24.04 to 6.32.08.
gDirectory = ROOTfile;

// Loop over factories explicitly mentioned on command line
for(unsigned int i=0;i<toprint.size();i++){
string name =fac_info[i].dataClassName;
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