diff --git a/solr/core/src/test-files/log4j.properties b/solr/core/src/test-files/log4j.properties
index 9b74a5f22b2..74a5d358eb4 100644
--- a/solr/core/src/test-files/log4j.properties
+++ b/solr/core/src/test-files/log4j.properties
@@ -8,3 +8,17 @@ log4j.appender.CONSOLE.layout.ConversionPattern=%-5p - %d{yyyy-MM-dd HH:mm:ss.SS
 
 log4j.logger.org.apache.zookeeper=WARN
 log4j.logger.org.apache.hadoop=WARN
+
+#log4j.logger.org.apache.solr.update.processor.LogUpdateProcessor=DEBUG
+#log4j.logger.org.apache.solr.update.processor.DistributedUpdateProcessor=DEBUG
+#log4j.logger.org.apache.solr.update.PeerSync=DEBUG
+#log4j.logger.org.apache.solr.core.CoreContainer=DEBUG
+#log4j.logger.org.apache.solr.cloud.RecoveryStrategy=DEBUG
+#log4j.logger.org.apache.solr.cloud.SyncStrategy=DEBUG
+#log4j.logger.org.apache.solr.handler.admin.CoreAdminHandler=DEBUG
+#log4j.logger.org.apache.solr.cloud.ZkController=DEBUG
+#log4j.logger.org.apache.solr.update.DefaultSolrCoreState=DEBUG
+#log4j.logger.org.apache.solr.common.cloud.ConnectionManager=DEBUG
+#log4j.logger.org.apache.solr.update.UpdateLog.level=FINE
+#log4j.logger.org.apache.solr.cloud.ChaosMonkey=DEBUG
+#log4j.logger.org.apache.solr.update.TransactionLog=DEBUG
\ No newline at end of file