diff --git a/db/HGPdtToolDb/HGPdtToolDbImpl.cpp b/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
index b45bf95..daf10c7 100644
--- a/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
+++ b/db/HGPdtToolDb/HGPdtToolDbImpl.cpp
@@ -1,6 +1,7 @@
 #include "HGPdtToolDbImpl.hpp"
 #include "HGPdtToolDb.h"
 #include "base/HGInc.h"
+#include "base/HGInfo.h"
 #include "HGString.h"
 
 const HGChar* INITTIAL_INSPECTION[] =
@@ -1004,6 +1005,7 @@ void HGAPI HGPdtToolDbUserMgrImpl::ThreadFunc(HGThread thread, HGPointer param)
 		if (0 != ret)
 		{
 			int errNo = mysql_errno(p->m_sql);
+			HGBase_WriteInfo(HGBASE_INFOTYPE_ERROR, "HGPdtToolDbUserMgrImpl::ThreadFunc mysql error=%d", errNo);
 			event = (errNo >= 1158 && errNo <= 1161) ? HGPDTTOOLDB_USEREVENT_NETERROR : HGPDTTOOLDB_USEREVENT_DBERROR;
 		}
 		else if (takeUserName == "root" && takeUserName != p->m_userName)