HDFS-8961. Investigate lock issue in o.a.h.hdfs.shortcircuit.DfsClientShmManager.EndpointShmManager. Contributed by Mingliang Liu.

hadoop-hdfs-project/hadoop-hdfs-client/dev-support/findbugsExcludeFile.xml

@@ -21,4 +21,14 @@
     <Package name="org.apache.hadoop.hdfs.protocol.proto" />
     <Bug pattern="SE_BAD_FIELD,MS_SHOULD_BE_FINAL,UCF_USELESS_CONTROL_FLOW" />
   </Match>
+  <Match>
+    <Class name="org.apache.hadoop.hdfs.shortcircuit.DfsClientShmManager$EndpointShmManager" />
+    <Method name="allocSlot" />
+    <Bug pattern="UL_UNRELEASED_LOCK_EXCEPTION_PATH" />
+  </Match>
+  <Match>
+    <Class name="org.apache.hadoop.hdfs.shortcircuit.DfsClientShmManager$EndpointShmManager" />
+    <Method name="allocSlot" />
+    <Bug pattern="UL_UNRELEASED_LOCK" />
+  </Match>
 </FindBugsFilter>

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -1237,6 +1237,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-8682. Should not remove decommissioned node,while calculating the
     number of live/dead decommissioned node. (J. Andreina via vinayakumarb)
 
+    HDFS-8961. Investigate lock issue in o.a.h.hdfs.shortcircuit.
+    DfsClientShmManager.EndpointShmManager. (Mingliang Liu via wheat9)
+
 Release 2.7.2 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/dev-support/findbugsExcludeFile.xml

@@ -176,16 +176,6 @@
        <Method name="setDirInternal" />
        <Bug pattern="DM_STRING_CTOR" />
      </Match>
-    <Match>
-      <Class name="org.apache.hadoop.hdfs.shortcircuit.DfsClientShmManager$EndpointShmManager" />
-      <Method name="allocSlot" />
-      <Bug pattern="UL_UNRELEASED_LOCK_EXCEPTION_PATH" />
-    </Match>
-    <Match>
-      <Class name="org.apache.hadoop.hdfs.shortcircuit.DfsClientShmManager$EndpointShmManager" />
-      <Method name="allocSlot" />
-      <Bug pattern="UL_UNRELEASED_LOCK" />
-    </Match>
     <!-- Manually verified to be okay, we want to throw away the top bit here -->
     <Match>
       <Class name="org.apache.hadoop.hdfs.server.namenode.CachedBlock" />