allow empty json status files

Else we crash fatally on an existing but empty status file like
/etc/pve/manager_status , reproducible with:
$ > /etc/pve/ha/manager_status

We do not want to catch arbitrary errors as then users cannot
reconstruct what happened in the event of an error.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/src/PVE/HA/Config.pm b/src/PVE/HA/Config.pm
index c9aa8a53d866f409e1704db6b2de182b3837b337..00b338d62f91342d6201539233c2114327ce2e83 100644 (file)
--- a/src/PVE/HA/Config.pm
+++ b/src/PVE/HA/Config.pm
@@ -38,7 +38,7 @@ cfs_register_file($ha_fence_config,
 sub json_reader {
     my ($filename, $data) = @_;
 
-    return defined($data) ? decode_json($data) : {};
+    return defined($data) && length($data) > 0 ? decode_json($data) : {};
 }
 
 sub json_writer {