Index: src/event/ngx_event_openssl.c
===================================================================
--- src/event/ngx_event_openssl.c	(revision 1073)
+++ src/event/ngx_event_openssl.c	(working copy)
@@ -404,6 +404,8 @@
     int        n, sslerr;
     ngx_err_t  err;
 
+    ERR_clear_error();
+
     n = SSL_do_handshake(c->ssl->connection);
 
     ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_do_handshake: %d", n);
@@ -605,6 +607,8 @@
 
     bytes = 0;
 
+    ERR_clear_error();
+
     /*
      * SSL_read() may return data in parts, so try to read
      * until SSL_read() would return no data
@@ -897,6 +901,8 @@
 
     ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL to write: %d", size);
 
+    ERR_clear_error();
+
     n = SSL_write(c->ssl->connection, data, size);
 
     ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "SSL_write: %d", n);
@@ -1002,6 +1008,8 @@
     again = 0;
     sslerr = 0;
 
+    ERR_clear_error();
+
     for ( ;; ) {
         n = SSL_shutdown(c->ssl->connection);