3 files changed, 15 insertions, 0 deletions
diff --git a/examples/public-inbox-httpd@.service b/examples/public-inbox-httpd@.service
index 56117ef0..e811da40 100644
--- a/examples/public-inbox-httpd@.service
+++ b/examples/public-inbox-httpd@.service
@@ -20,7 +20,12 @@ ExecStartPre = /bin/mkdir -p -m 1777 /tmp/.pub-inline
  ExecStart = /usr/local/bin/public-inbox-httpd \
  -1 /var/log/public-inbox/httpd.out.log
  StandardError = syslog
+
+# NonBlocking is REQUIRED to avoid a race condition if running
+# simultaneous services
+NonBlocking = true
  Sockets = public-inbox-httpd.socket
+
  KillSignal = SIGQUIT
  User = nobody
  Group = nogroup
diff --git a/examples/public-inbox-nntpd@.service b/examples/public-inbox-nntpd@.service
index 62202c2f..a879841e 100644
--- a/examples/public-inbox-nntpd@.service
+++ b/examples/public-inbox-nntpd@.service
@@ -20,7 +20,12 @@ ExecStartPre = /bin/mkdir -p -m 1777 /tmp/.pub-inline
  ExecStart = /usr/local/bin/public-inbox-nntpd \
  -1 /var/log/public-inbox/nntpd.out.log
  StandardError = syslog
+
+# NonBlocking is REQUIRED to avoid a race condition if running
+# simultaneous services
+NonBlocking = true
  Sockets = public-inbox-nntpd.socket
+
  KillSignal = SIGQUIT
  User = nobody
  Group = nogroup
diff --git a/examples/unsubscribe-psgi@.service b/examples/unsubscribe-psgi@.service
index acc29e8e..c8721fbe 100644
--- a/examples/unsubscribe-psgi@.service
+++ b/examples/unsubscribe-psgi@.service
@@ -12,7 +12,12 @@ After = unsubscribe-psgi.socket
  # any PSGI server ought to work,
  # but public-inbox-httpd supports socket activation like unsubscribe.milter
  ExecStart = /usr/local/bin/public-inbox-httpd -W0 /etc/unsubscribe.psgi
+
+# NonBlocking is REQUIRED to avoid a race condition if running
+# simultaneous services
+NonBlocking = true
  Sockets = unsubscribe-psgi.socket
+
  # we need to modify the mlmmj spool
  User = mlmmj
  KillMode = process