System and method for providing a distributed transaction lock in a transactional middleware machine environment

A system for providing a distributed transaction locking mechanism in a transactional middleware machine environment, comprising:

• one or more processors;
• a transactional server, running on the one or more processors, operate to
• use a global transaction identifier to locate a hash bucket in a transaction hash table, wherein the transaction hash table contains a plurality of hash buckets;
• lock said hash bucket in the transaction hash table;
• and
• allowing only one process to access one or more global transaction entry structures in the transaction table before said hash bucket is unlocked, wherein said one or more global transaction entry structures are associated with the locked hash bucket in the transaction hash table.

The system of clam 14, wherein:

• the transactional server operate to
• delink said one or more global transaction entry structures with said hash bucket in the transaction hash table,
• unlock said hash bucket in the transaction hash table,
• lock the shared memory,
• remove said one or more global transaction entry structures in the transaction table, and
• unlock the shared memory.

A non-transitory machine readable storage medium having instructions stored thereon that when executed cause a system to perform the steps comprising:

• using a global transaction identifier to locate a hash bucket in a transaction hash table, wherein the transaction hash table contains a plurality of hash buckets;
• locking said hash bucket in the transaction hash table;
• and
• allowing only one process to access one or more global transaction entry structures in the transaction table before said hash bucket is unlocked, wherein said one or more global transaction entry structures are associated with the locked hash bucket in the transaction hash table.