diff --git a/tools/run_tests/run_build_statistics.py b/tools/run_tests/run_build_statistics.py
index 9c17cd1db9188914a7b655c45348ff846d7eeda3..32f7bc01e8ad94977cd49855a77fa153453042c6 100755
--- a/tools/run_tests/run_build_statistics.py
+++ b/tools/run_tests/run_build_statistics.py
@@ -75,6 +75,8 @@ _KNOWN_ERRORS = [
     ('hudson.remoting.RemotingSystemException: java.io.IOException: '
      'Backing channel is disconnected.'),
     'hudson.remoting.ChannelClosedException',
+    'Could not initialize class hudson.Util',
+    'Too many open files in system',
     'FAILED: bins/tsan/qps_openloop_test GRPC_POLL_STRATEGY=epoll',
     'FAILED: bins/tsan/qps_openloop_test GRPC_POLL_STRATEGY=legacy',
     'FAILED: bins/tsan/qps_openloop_test GRPC_POLL_STRATEGY=poll',