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-rw-r--r--qpid/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp7
1 files changed, 5 insertions, 2 deletions
diff --git a/qpid/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp b/qpid/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp
index 787be7de2a..e6255dcd6f 100644
--- a/qpid/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp
+++ b/qpid/cpp/src/qpid/client/amqp0_10/SessionImpl.cpp
@@ -432,8 +432,11 @@ uint32_t SessionImpl::getUnsettledAcksImpl(const std::string* destination)
void SessionImpl::syncImpl(bool block)
{
- if (block) session.sync();
- else session.flush();
+ {
+ ScopedLock l(lock);
+ if (block) session.sync();
+ else session.flush();
+ }
//cleanup unconfirmed accept records:
incoming.pendingAccept();
}