我将不胜感激下面的任何帮助,在此先感谢您。我复制了一份Google Bert 的微调笔记本,并使用 Cloud TPU 和 Bucket 在上面训练了 SQUAD 数据集。开发集上的预测是ok的,所以我在本地下载了checkpoint、model.ckpt.meta、model.ckpt.index和model.ckpt.data文件并尝试使用代码恢复:
sess = tf.Session(config=tf.ConfigProto(allow_soft_placement=True))
saver = tf.train.import_meta_graph(META_FILE) # META_FILE being path to .meta
saver.restore(sess, 'model.ckpt')
但是,我得到了错误:
op_def = op_dict[node.op]
KeyError: 'InfeedEnqueueTuple'
我认为它是Cloud TPU 工具的一部分,我应该继续使用 Cloud TPU,所以我尝试了以下(参考):
# code from cells before includes
...
tf.contrib.cloud.configure_gcs(session, credentials=auth_info)
...
tpu_cluster_resolver = tf.contrib.cluster_resolver.TPUClusterResolver(TPU_ADDRESS)
run_config = tf.contrib.tpu.RunConfig(
cluster=tpu_cluster_resolver,
model_dir=OUTPUT_DIR,
save_checkpoints_steps=SAVE_CHECKPOINTS_STEPS,
tpu_config=tf.contrib.tpu.TPUConfig(
iterations_per_loop=ITERATIONS_PER_LOOP,
num_shards=NUM_TPU_CORES,
per_host_input_for_training=tf.contrib.tpu.InputPipelineConfig.PER_HOST_V2))
...
问题单元格:
"""
# not valid checkpoint error. <bucket> placeholder for cloud bucket name
sess = tf.Session()
META_FILE = "gs://<bucket>/bert/models/bertsquad/model.ckpt-10949.meta"
CKPT_FILE = "gs://<bucket>/bert/models/bertsquad/model.ckpt"
saver = tf.train.import_meta_graph(META_FILE)
saver.restore(sess, CKPT_FILE)
"""
from google.cloud import storage
from tensorflow import MetaGraphDef
client = storage.Client(project="agent-helper-4a014")
bucket = client.get_bucket(<bucket>)
metafile = "bert/models/bertsquad/model.ckpt-10949.meta"
# using full path gs://<bucket>/bert/models/bertsquad doesn't work
blob = bucket.get_blob(metafile)
#blob = bucket.blob(metafile)
#model_graph = blob.download_to_filename("model.ckpt")
model_graph = blob.download_as_string()
mgd = MetaGraphDef()
mgd.ParseFromString(model_graph)
with tf.Session() as sess:
saver = tf.train.import_meta_graph(mgd, clear_devices=True)
init_checkpoint = saver.restore(sess, 'model.ckpt')
这反过来又给出了以下错误:
InvalidArgumentError (see above for traceback): Restoring from checkpoint failed. This is most likely due to a mismatch between the current graph and the graph from the checkpoint. Please ensure that you have not altered the graph expected based on the checkpoint. Original error:
No OpKernel was registered to support Op 'InfeedEnqueueTuple' with these attrs. Registered devices: [CPU,XLA_CPU], Registered kernels:
<no registered kernels>
[[node input_pipeline_task0/while/InfeedQueue/enqueue/0 (defined at <ipython-input-67-e4b52b7b5944>:21) = InfeedEnqueueTuple[_class=["loc:@input_pipeline_task0/while/IteratorGetNext"], device_ordinal=0, dtypes=[DT_INT32, DT_INT32, DT_INT32, DT_INT32, DT_INT32, DT_INT32], shapes=[[2], [2,384], [2,384], [2,384], [2], [2]], _device="/job:worker/task:0/device:CPU:0"](input_pipeline_task0/while/IteratorGetNext, input_pipeline_task0/while/IteratorGetNext:1, input_pipeline_task0/while/IteratorGetNext:2, input_pipeline_task0/while/IteratorGetNext:3, input_pipeline_task0/while/IteratorGetNext:4, input_pipeline_task0/while/IteratorGetNext:5)]]