Import wiredtiger: 1a29eac4dc8cf82de437292da546e3f4039268a4 from branch mongodb-3.8

ref: 596a3c7c01..1a29eac4dc
for: 3.7.1

WT-3079       Make sure eviction visits all trees
WT-3133       Detect or track long latency operations
WT-3295       Allow LSM to merge into custom data sources
WT-3587       Remove HAVE_VERBOSE conditional compilation
WT-3654       Fix warning in Windows build on evergreen
WT-3716       Restore the WT_VERB_TEMPORARY verbose flag.
WT-3720       flags macros cast flags to unsigned values, hiding warnings.
WT-3732       Handle adding WT indices while cursors on the table are open
WT-3734       Fix undefined behavior in verbose output
WT-3738       Review internal session allocation accounting
WT-3753       Building on Windows --enable-java
WT-3772       Hot backup causes uncontrolled growth of WiredTigerPreplog files
WT-3774       Enhance Python lookaside testing to cover cursor modify
WT-3776       Cursor remove operation unpins page too early
WT-3780       Improve error messages on invalid WT_CURSOR::modify usage
WT-3783       Fix transaction isolation to use the correct enum
WT-3786       Transactions with timestamps should read their writes
WT-3787       test_compact02 failed as compaction halted due to eviction pressure
WT-3790       Switch statistics to rdtsc from epoch calls
WT-3793       WiredTiger page debug dump functions should unpack integer keys
WT-3794       Coverity 1383547 and lint
WT-3795       lint cleanups for the op-tracking software, reduce record write size.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/third_party/wiredtiger/src/schema/schema_drop.c b/src/third_party/wiredtiger/src/schema/schema_drop.c
index 4ee34f68a8c..8501de8b805 100644
--- a/src/third_party/wiredtiger/src/schema/schema_drop.c
+++ b/src/third_party/wiredtiger/src/schema/schema_drop.c
@@ -124,7 +124,14 @@ __drop_table(
 	 * being reopened while it is being dropped.  One issue is that the
 	 * WT_WITHOUT_LOCKS macro can drop and reacquire the global table lock,
 	 * avoiding deadlocks while waiting for LSM operation to quiesce.
+	 *
+	 * Temporarily getting the table exclusively serves the purpose
+	 * of ensuring that cursors on the table that are already open
+	 * must at least be closed before this call proceeds.
 	 */
+	WT_ERR(__wt_schema_get_table_uri(session, uri, true,
+	    WT_DHANDLE_EXCLUSIVE, &table));
+	WT_ERR(__wt_schema_release_table(session, table));
 	WT_ERR(__wt_schema_get_table_uri(session, uri, true, 0, &table));
 
 	/* Drop the column groups. */