commit b029b42e253120c33e4bf958db0b23120076152a
Author: GAO Xiaoxin <dennis.gao@greatopensource.com>
Date:   Sun Jun 28 00:46:39 2020 +0800

    Postfix #98616 XA PREPARE/XA COMMIT/XA ROLLBACK lost if mysql crash just after binlog flush
    
    If a trx in trx_sys->rw_trx_list has been rollbacked in trx_rollback_resurrected during start-up
     recover due to trx->xid->get_gtrid_length()==0, xarecover_handlerton should skip this trx rather
     than do hton->rollback_by_xid, which will lead mysql crash.

diff --git a/sql/xa.cc b/sql/xa.cc
index 2b3960d..af3c202 100644
--- a/sql/xa.cc
+++ b/sql/xa.cc
@@ -155,8 +155,12 @@ static my_bool xarecover_handlerton(THD *unused, plugin_ref plugin,
             transaction_cache_insert_recovery(info->list + i);
             info->found_foreign_xids++;
           } else {
-            sql_print_information("rollback xid %s due to find xa transaction partial executed", target_xid.xid_to_str(buf));
-            hton->rollback_by_xid(hton, info->list + i);
+            if (target_xid.get_gtrid_length() > 0) {
+              sql_print_information("rollback xid %s due to find xa transaction partial executed", target_xid.xid_to_str(buf));
+              hton->rollback_by_xid(hton, info->list + i);
+            } else {
+              sql_print_information("find an trx with gtrid_length=0, which means a rollbacked trx.");
+            }
           }
 
           continue;