commit | e24331bf116f5efc8d42bc888a0dbd271aa92aab | [log] [tgz] |
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author | RJ Skerry-Ryan <rjryan@google.com> | Sat Mar 28 10:02:22 2020 -0700 |
committer | TensorFlower Gardener <gardener@tensorflow.org> | Sat Mar 28 10:06:18 2020 -0700 |
tree | ec01b250fd969dbb9791586e64c57d705e68d131 | |
parent | a1a7af994db7e5891ab4294c0a678cf7ff1632cd [diff] |
Fix race condition in TensorArrayWrite grad. It was possible for a TensorArrayWrite/Scatter/Split to occur after its corresponding TensorArrayGrad op was executed. The TensorArrayGrad op must execute after the last write so that it is created with the correct size. Since TensorArrayGrad converts its source TensorArray to fixed-size, this causes an exception when the final TensorArrayWrite executes since it cannot grow the TensorArray. This fix introduces a control dependency on the TensorArrayWrite op, to ensure TensorArrayGrad runs after the last write. Also, fix a similar pattern in TensorArrayScatter and TensorArraySplit's gradients even though the race has not been observed for them. PiperOrigin-RevId: 303515506 Change-Id: Ia363b94922b8855f01faa801818839559d55b0da
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