title: Colab: (0) UNIMPLEMENTED: DNN library is not found
body: <p>I have pretrained model for object detection (Google Colab + TensorFlow) inside Google Colab and I run it two-three times per week for new images I have and everything was fine for the last year till this week. Now when I try to run model I have this message:</p>
  <pre><code>Graph execution error:
  
  2 root error(s) found.
    (0) UNIMPLEMENTED:  DNN library is not found.
       [[{{node functional_1/conv1_conv/Conv2D}}]]
       [[StatefulPartitionedCall/SecondStagePostprocessor/BatchMultiClassNonMaxSuppression/MultiClassNonMaxSuppression/Reshape_5/_126]]
    (1) UNIMPLEMENTED:  DNN library is not found.
       [[{{node functional_1/conv1_conv/Conv2D}}]]
  0 successful operations.
  0 derived errors ignored. [Op:__inference_restored_function_body_27380] ***
  </code></pre>
  <p>Never happended before.</p>
  <p>Before I can run my model I have to install Tensor Flow object detection API with this command:</p>
  <pre><code>import os
  
  os.chdir('/project/models/research')
  
  !protoc object_detection/protos/*.proto --python_out=.
  !cp object_detection/packages/tf2/setup.py .
  !python -m pip install .
  </code></pre>
  <p>This is the output of command:</p>
  <pre><code>Processing /content/gdrive/MyDrive/models/research
    DEPRECATION: A future pip version will change local packages to be built in-place without first copying to a temporary directory. We recommend you use --use-feature=in-tree-build to test your packages with this new behavior before it becomes the default.
     pip 21.3 will remove support for this functionality. You can find discussion regarding this at https://github.com/pypa/pip/issues/7555.
  Collecting avro-python3
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  Collecting fastavro&lt;2,&gt;=0.21.4
    Downloading fastavro-1.4.9-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (2.3 MB)
       |████████████████████████████████| 2.3 MB 38.1 MB/s
  Requirement already satisfied: pyarrow&lt;7.0.0,&gt;=0.15.1 in /usr/local/lib/python3.7/dist-packages (from apache-beam-&gt;object-detection==0.1) (6.0.1)
  Requirement already satisfied: pydot&lt;2,&gt;=1.2.0 in /usr/local/lib/python3.7/dist-packages (from apache-beam-&gt;object-detection==0.1) (1.3.0)
  Collecting proto-plus&lt;2,&gt;=1.7.1
    Downloading proto_plus-1.19.9-py3-none-any.whl (45 kB)
       |████████████████████████████████| 45 kB 3.2 MB/s
  Collecting requests&lt;3.0.0dev,&gt;=2.18.0
    Downloading requests-2.27.1-py2.py3-none-any.whl (63 kB)
       |████████████████████████████████| 63 kB 1.8 MB/s
  Collecting dill&lt;0.3.2,&gt;=0.3.1.1
    Downloading dill-0.3.1.1.tar.gz (151 kB)
       |████████████████████████████████| 151 kB 44.4 MB/s
  Collecting numpy&gt;=1.15.4
    Downloading numpy-1.20.3-cp37-cp37m-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (15.3 MB)
       |████████████████████████████████| 15.3 MB 21.1 MB/s
  Collecting orjson&lt;4.0
    Downloading orjson-3.6.6-cp37-cp37m-manylinux_2_24_x86_64.whl (245 kB)
       |████████████████████████████████| 245 kB 53.2 MB/s
  Collecting hdfs&lt;3.0.0,&gt;=2.1.0
    Downloading hdfs-2.6.0-py3-none-any.whl (33 kB)
  Collecting pymongo&lt;4.0.0,&gt;=3.8.0
    Downloading pymongo-3.12.3-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (508 kB)
       |████████████████████████████████| 508 kB 44.3 MB/s
  Requirement already satisfied: docopt in /usr/local/lib/python3.7/dist-packages (from hdfs&lt;3.0.0,&gt;=2.1.0-&gt;apache-beam-&gt;object-detection==0.1) (0.6.2)
  Collecting protobuf&gt;=3.12.0
    Downloading protobuf-3.19.4-cp37-cp37m-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (1.1 MB)
       |████████████████████████████████| 1.1 MB 47.3 MB/s
  Requirement already satisfied: charset-normalizer~=2.0.0 in /usr/local/lib/python3.7/dist-packages (from requests&lt;3.0.0dev,&gt;=2.18.0-&gt;google-api-core&lt;3dev,&gt;=1.21.0-&gt;google-api-python-client&gt;=1.6.7-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (2.0.11)
  Requirement already satisfied: opencv-python&gt;=4.1.0.25 in /usr/local/lib/python3.7/dist-packages (from lvis-&gt;object-detection==0.1) (4.1.2.30)
  Requirement already satisfied: cycler&gt;=0.10.0 in /usr/local/lib/python3.7/dist-packages (from lvis-&gt;object-detection==0.1) (0.11.0)
  Requirement already satisfied: kiwisolver&gt;=1.1.0 in /usr/local/lib/python3.7/dist-packages (from lvis-&gt;object-detection==0.1) (1.3.2)
  Requirement already satisfied: text-unidecode&gt;=1.3 in /usr/local/lib/python3.7/dist-packages (from python-slugify-&gt;kaggle&gt;=1.3.9-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (1.3)
  Requirement already satisfied: regex in /usr/local/lib/python3.7/dist-packages (from sacrebleu-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (2019.12.20)
  Requirement already satisfied: tabulate&gt;=0.8.9 in /usr/local/lib/python3.7/dist-packages (from sacrebleu-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (0.8.9)
  Collecting portalocker
    Downloading portalocker-2.3.2-py2.py3-none-any.whl (15 kB)
  Collecting colorama
    Downloading colorama-0.4.4-py2.py3-none-any.whl (16 kB)
  Requirement already satisfied: scikit-learn&gt;=0.21.3 in /usr/local/lib/python3.7/dist-packages (from seqeval-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (1.0.2)
  Requirement already satisfied: joblib&gt;=0.11 in /usr/local/lib/python3.7/dist-packages (from scikit-learn&gt;=0.21.3-&gt;seqeval-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (1.1.0)
  Requirement already satisfied: threadpoolctl&gt;=2.0.0 in /usr/local/lib/python3.7/dist-packages (from scikit-learn&gt;=0.21.3-&gt;seqeval-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (3.1.0)
  Requirement already satisfied: typeguard&gt;=2.7 in /usr/local/lib/python3.7/dist-packages (from tensorflow-addons-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (2.7.1)
  Requirement already satisfied: promise in /usr/local/lib/python3.7/dist-packages (from tensorflow-datasets-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (2.3)
  Requirement already satisfied: future in /usr/local/lib/python3.7/dist-packages (from tensorflow-datasets-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (0.16.0)
  Requirement already satisfied: attrs&gt;=18.1.0 in /usr/local/lib/python3.7/dist-packages (from tensorflow-datasets-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (21.4.0)
  Requirement already satisfied: importlib-resources in /usr/local/lib/python3.7/dist-packages (from tensorflow-datasets-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (5.4.0)
  Requirement already satisfied: tensorflow-metadata in /usr/local/lib/python3.7/dist-packages (from tensorflow-datasets-&gt;tf-models-official&gt;=2.5.1-&gt;object-detection==0.1) (1.6.0)
  Collecting tensorflow-io-gcs-filesystem&gt;=0.23.1
    Downloading tensorflow_io_gcs_filesystem-0.24.0-cp37-cp37m-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (2.1 MB)
       |████████████████████████████████| 2.1 MB 40.9 MB/s
  Building wheels for collected packages: object-detection, py-cpuinfo, dill, avro-python3, seqeval
    Building wheel for object-detection (setup.py) ... done
    Created wheel for object-detection: filename=object_detection-0.1-py3-none-any.whl size=1686316 sha256=775b8c34c800b3b3139d1067abd686af9ce9158011fccfb5450ccfd9bf424a5a
    Stored in directory: /tmp/pip-ephem-wheel-cache-rmw0fvil/wheels/d0/e3/e9/b9ffe85019ec441e90d8ff9eddee9950c4c23b7598204390b9
    Building wheel for py-cpuinfo (setup.py) ... done
    Created wheel for py-cpuinfo: filename=py_cpuinfo-8.0.0-py3-none-any.whl size=22257 sha256=ac956c4c039868fdba78645bea056754e667e8840bea783ad2ca75e4d3e682c6
    Stored in directory: /root/.cache/pip/wheels/d2/f1/1f/041add21dc9c4220157f1bd2bd6afe1f1a49524c3396b94401
    Building wheel for dill (setup.py) ... done
    Created wheel for dill: filename=dill-0.3.1.1-py3-none-any.whl size=78544 sha256=d9c6cdfd69aea2b4d78e6afbbe2bc530394e4081eb186eb4f4cd02373ca739fd
    Stored in directory: /root/.cache/pip/wheels/a4/61/fd/c57e374e580aa78a45ed78d5859b3a44436af17e22ca53284f
    Building wheel for avro-python3 (setup.py) ... done
    Created wheel for avro-python3: filename=avro_python3-1.10.2-py3-none-any.whl size=44010 sha256=4eca8b4f30e4850d5dabccee36c40c8dda8a6c7e7058cfb7f0258eea5ce7b2b3
    Stored in directory: /root/.cache/pip/wheels/d6/e5/b1/6b151d9b535ee50aaa6ab27d145a0104b6df02e5636f0376da
    Building wheel for seqeval (setup.py) ... done
    Created wheel for seqeval: filename=seqeval-1.2.2-py3-none-any.whl size=16180 sha256=0ddfa46d0e36e9be346a90833ef11cc0d38cc7e744be34c5a0d321f997a30cba
    Stored in directory: /root/.cache/pip/wheels/05/96/ee/7cac4e74f3b19e3158dce26a20a1c86b3533c43ec72a549fd7
  Successfully built object-detection py-cpuinfo dill avro-python3 seqeval
  Installing collected packages: requests, protobuf, numpy, tf-estimator-nightly, tensorflow-io-gcs-filesystem, tensorboard, keras, tensorflow, portalocker, dill, colorama, tf-slim, tensorflow-text, tensorflow-model-optimization, tensorflow-addons, seqeval, sentencepiece, sacrebleu, pyyaml, pymongo, py-cpuinfo, proto-plus, orjson, opencv-python-headless, hdfs, fastavro, tf-models-official, tensorflow-io, lvis, avro-python3, apache-beam, object-detection
    Attempting uninstall: requests
      Found existing installation: requests 2.23.0
      Uninstalling requests-2.23.0:
        Successfully uninstalled requests-2.23.0
    Attempting uninstall: protobuf
      Found existing installation: protobuf 3.17.3
      Uninstalling protobuf-3.17.3:
        Successfully uninstalled protobuf-3.17.3
    Attempting uninstall: numpy
      Found existing installation: numpy 1.19.5
      Uninstalling numpy-1.19.5:
        Successfully uninstalled numpy-1.19.5
    Attempting uninstall: tensorflow-io-gcs-filesystem
      Found existing installation: tensorflow-io-gcs-filesystem 0.23.1
      Uninstalling tensorflow-io-gcs-filesystem-0.23.1:
        Successfully uninstalled tensorflow-io-gcs-filesystem-0.23.1
    Attempting uninstall: tensorboard
      Found existing installation: tensorboard 2.7.0
      Uninstalling tensorboard-2.7.0:
        Successfully uninstalled tensorboard-2.7.0
    Attempting uninstall: keras
      Found existing installation: keras 2.7.0
      Uninstalling keras-2.7.0:
        Successfully uninstalled keras-2.7.0
    Attempting uninstall: tensorflow
      Found existing installation: tensorflow 2.7.0
      Uninstalling tensorflow-2.7.0:
        Successfully uninstalled tensorflow-2.7.0
    Attempting uninstall: dill
      Found existing installation: dill 0.3.4
      Uninstalling dill-0.3.4:
        Successfully uninstalled dill-0.3.4
    Attempting uninstall: pyyaml
      Found existing installation: PyYAML 3.13
      Uninstalling PyYAML-3.13:
        Successfully uninstalled PyYAML-3.13
    Attempting uninstall: pymongo
      Found existing installation: pymongo 4.0.1
      Uninstalling pymongo-4.0.1:
        Successfully uninstalled pymongo-4.0.1
  ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
  yellowbrick 1.3.post1 requires numpy&lt;1.20,&gt;=1.16.0, but you have numpy 1.20.3 which is incompatible.
  multiprocess 0.70.12.2 requires dill&gt;=0.3.4, but you have dill 0.3.1.1 which is incompatible.
  google-colab 1.0.0 requires requests~=2.23.0, but you have requests 2.27.1 which is incompatible.
  datascience 0.10.6 requires folium==0.2.1, but you have folium 0.8.3 which is incompatible.
  albumentations 0.1.12 requires imgaug&lt;0.2.7,&gt;=0.2.5, but you have imgaug 0.2.9 which is incompatible.
  Successfully installed apache-beam-2.35.0 avro-python3-1.10.2 colorama-0.4.4 dill-0.3.1.1 fastavro-1.4.9 hdfs-2.6.0 keras-2.8.0 lvis-0.5.3 numpy-1.20.3 object-detection-0.1 opencv-python-headless-4.5.5.62 orjson-3.6.6 portalocker-2.3.2 proto-plus-1.19.9 protobuf-3.19.4 py-cpuinfo-8.0.0 pymongo-3.12.3 pyyaml-5.4.1 requests-2.27.1 sacrebleu-2.0.0 sentencepiece-0.1.96 seqeval-1.2.2 tensorboard-2.8.0 tensorflow-2.8.0 tensorflow-addons-0.15.0 tensorflow-io-0.24.0 tensorflow-io-gcs-filesystem-0.24.0 tensorflow-model-optimization-0.7.0 tensorflow-text-2.8.1 tf-estimator-nightly-2.8.0.dev2021122109 tf-models-official-2.8.0 tf-slim-1.1.0
  </code></pre>
  <p>I am noticing that this command uninstalling tensorflow 2.7 and installing tensorflow 2.8. I am not sure it was happening before. Maybe it's the reason DNN library link is missing o something?</p>
  <p>I can confirm these:</p>
  <ol>
  <li>Nothing was changed inside pretrained model or already installed model or object_detection source files I downloaded a year ago.</li>
  <li>I tried to run command !pip install dnn - not working</li>
  <li>I tried to restart runtime (without disconnecting) - not working</li>
  </ol>
  <p>Somebody can help? Thanks.</p>