Merge pull request #2012 from nats-io/arm32_panic

Fix for #2011 and atomics on 32bit systems.

server/filestore.go

@@ -86,20 +86,20 @@ type fileStore struct {
 
 // Represents a message store block and its data.
 type msgBlock struct {
-	mu    sync.RWMutex
-	fs    *fileStore
-	mfn   string
-	mfd   *os.File
-	ifn   string
-	ifd   *os.File
-	liwsz int64
-	index uint64
-	bytes uint64
-	msgs  uint64
-	first msgId
-	last  msgId
-	lwits int64
-
+	// Here for 32bit systems and atomic.
+	first   msgId
+	last    msgId
+	mu      sync.RWMutex
+	fs      *fileStore
+	mfn     string
+	mfd     *os.File
+	ifn     string
+	ifd     *os.File
+	liwsz   int64
+	index   uint64
+	bytes   uint64
+	msgs    uint64
+	lwits   int64
 	lwts    int64
 	llts    int64
 	lrts    int64

server/jetstream.go

@@ -73,14 +73,15 @@ type JetStreamAPIStats struct {
 
 // This is for internal accounting for JetStream for this server.
 type jetStream struct {
+	// These are here first because of atomics on 32bit systems.
+	memReserved   int64
+	storeReserved int64
+	apiCalls      int64
 	mu            sync.RWMutex
 	srv           *Server
 	config        JetStreamConfig
 	cluster       *jetStreamCluster
 	accounts      map[*Account]*jsAccount
-	memReserved   int64
-	storeReserved int64
-	apiCalls      int64
 	apiSubs       *Sublist
 	disabled      bool
 	oos           bool