mds: warn if replay used ino doesn't match session's next

2 files changed, 12 insertions, 1 deletions

diff --git a/src/mds/SessionMap.h b/src/mds/SessionMap.h
index 34fbe693119..06d95893dc2 100644
--- a/src/mds/SessionMap.h
+++ b/src/mds/SessionMap.h
@@ -60,6 +60,11 @@ public:
   interval_set<inodeno_t> prealloc_inos;   // preallocated, ready to use.
   interval_set<inodeno_t> used_inos;       // journaling use
 
+  inodeno_t next_ino() {
+    if (prealloc_inos.empty())
+      return 0;
+    return prealloc_inos.start();
+  }
   inodeno_t take_ino(inodeno_t ino = 0) {
     assert(!prealloc_inos.empty());
 
diff --git a/src/mds/journal.cc b/src/mds/journal.cc
index 3073a23e72d..6e33083d17d 100644
--- a/src/mds/journal.cc
+++ b/src/mds/journal.cc
@@ -619,7 +619,13 @@ void EMetaBlob::replay(MDS *mds, LogSegment *logseg)
       assert(session);
       dout(20) << " (session prealloc " << session->prealloc_inos << ")" << dendl;
       if (used_preallocated_ino) {
-	inodeno_t i = session->take_ino();
+	inodeno_t next = session->next_ino();
+	inodeno_t i = session->take_ino(used_preallocated_ino);
+	if (next != i) {
+	  stringstream ss;
+	  ss << " replayed op " << client_reqs << " used ino " << i << " but session next is " << next;
+	  mds->logclient.log(LOG_WARN, ss);
+	}
 	assert(i == used_preallocated_ino);
 	session->used_inos.clear();
 	mds->sessionmap.projected = ++mds->sessionmap.version;