X-Git-Url: https://git.openstreetmap.org/chef.git/blobdiff_plain/40bc7fd7504ffd5f5b2f6805dc47136067f054ba..2e2107faaafde54a4a6078cb3a03c1975cbc7bbf:/cookbooks/planet/files/default/replication-bin/replicate-changesets

diff --git a/cookbooks/planet/files/default/replication-bin/replicate-changesets b/cookbooks/planet/files/default/replication-bin/replicate-changesets
index 363d6040a..8731c0d20 100755
--- a/cookbooks/planet/files/default/replication-bin/replicate-changesets
+++ b/cookbooks/planet/files/default/replication-bin/replicate-changesets
@@ -216,9 +216,7 @@ class Replicator
     Zlib::GzipWriter.open(tmp_data) do |fh|
       fh.write(changeset_dump(changesets))
     end
-    File.open(tmp_state, "w") do |fh|
-      fh.write(YAML.dump(@state))
-    end
+    File.write(tmp_state, YAML.dump(@state))
 
     # fsync the files in their old locations.
     fsync(tmp_data)
@@ -261,8 +259,13 @@ class Replicator
 
   # saves new state (including the changeset dump xml)
   def save!
-    File.open(@config["state_file"], "r") do |fl|
-      fl.flock(File::LOCK_EX)
+    File.open(@config["lock_file"], File::RDWR | File::CREAT, 0o600) do |fl|
+      # take the lock in non-blocking mode. if this process doesn't get the lock
+      # then another will be run from cron shortly. this prevents a whole bunch
+      # of processes queueing on the lock and causing weirdness if/when they
+      # get woken up in a random order.
+      got_lock = fl.flock(File::LOCK_EX | File::LOCK_NB)
+      break unless got_lock
 
       # try and write the files to tmp locations and then
       # move them into place later, to avoid in-progress
@@ -278,7 +281,7 @@ class Replicator
 
         fl.flock(File::LOCK_UN)
       rescue StandardError
-        STDERR.puts("Error! Couldn't update state.")
+        warn "Error! Couldn't update state."
         fl.flock(File::LOCK_UN)
         raise
       end
@@ -290,6 +293,9 @@ begin
   rep = Replicator.new(ARGV[0])
   rep.save!
 rescue StandardError => e
-  STDERR.puts "ERROR: #{e.message}"
+  warn "ERROR: #{e.message}"
+  e.backtrace.each do |frame|
+    warn "ERROR: #{frame}"
+  end
   exit 1
 end