Cannot apply BasicDBObject function to [B
I have the following gridfs
in a mongodb database:
db.outputFs.files.find()
{ "_id" : ObjectId("000000000000000000000001"), "chunkSize" : 261120, "length" : 232, "md5" : "42290309186cc5420acff293b92ae21d", "filename" : "/tmp/outputFs-01.tmp", "contentType" : null, "uploadDate" : ISODate("2015-04-13T13:50:48.259Z"), "aliases" : null, "metadata" : { "estado" : "FICHERO_PDTE_ENVIO", "dataDate" : "20141122", "inputOutputFs" : "output", "gridFileCompression" : "bzip2", "fileType" : "OUTPUT-TEST1", "filePath" : "/tmp/outputFs-01.tmp", "sourceParticipant" : "0100", "destinationParticipant" : "REE", "exportFileName" : "F1_0100_20141122_20150219.0", "processed" : "false", "fileMD5" : "4276e61a4b63d3d1d1b77e27e792bd13", "version" : 0 } }
{ "_id" : ObjectId("000000000000000000000002"), "chunkSize" : 261120, "length" : 232, "md5" : "42290309186cc5420acff293b92ae21d", "filename" : "/tmp/outputFs-02.tmp", "contentType" : null, "uploadDate" : ISODate("2015-04-13T13:50:48.259Z"), "aliases" : null, "metadata" : { "estado" : "FICHERO_ENVIADO_OK", "fechaEnvio" : ISODate("2015-04-13T13:50:48.259Z"), "dataDate" : "20141123", "inputOutputFs" : "output", "gridFileCompression" : "bzip2", "fileType" : "OUTPUT-TEST2", "filePath" : "/tmp/outputFs-02.tmp", "sourceParticipant" : "0100", "destinationParticipant" : "REE", "exportFileName" : "F1_0100_20141123_20150220.0", "processed" : "false", "fileMD5" : "4276e61a4b63d3d1d1b77e27e792bd13", "version" : 0 } }
db.outputFs.chunks.find()
{ "_id" : ObjectId("000000000000000000000001"), "files_id" : ObjectId("000000000000000000000001"), "n" : 0, "data" : { "$type" : 0, "$binary" : "QlpoOTFBWSZTWZSBQ/YABX5cAAAYQAH/+CAAMAFWA0NqptIb9UgAZ6qowAAFKSaJpGhk8ssmVlk7AAAALZtZZOf0vr859OqflcIs461Dm1skcSOpGpHMuu5HcsJG0j5I9PiR4kaRvvjWskfsVMkZVLxI3uRy/pGTqRj7VmMyTOBfUtb561rwkf0j09+Zbkd+cs1I77861xI7pypvfOt1v5DmR1I51nW7XGdaluRnGZjMzJMzOZGpHnrfGM56+/fnGPVVVVVqqpVVWxCSxCTSAEMkZI3IyqXuqXyRuR/i7kinChISkCh+wA==" } }
{ "_id" : ObjectId("000000000000000000000002"), "files_id" : ObjectId("000000000000000000000002"), "n" : 0, "data" : { "$type" : 0, "$binary" : "QlpoOTFBWSZTWZSBQ/YABX5cAAAYQAH/+CAAMAFWA0NqptIb9UgAZ6qowAAFKSaJpGhk8ssmVlk7AAAALZtZZOf0vr859OqflcIs461Dm1skcSOpGpHMuu5HcsJG0j5I9PiR4kaRvvjWskfsVMkZVLxI3uRy/pGTqRj7VmMyTOBfUtb561rwkf0j09+Zbkd+cs1I77861xI7pypvfOt1v5DmR1I51nW7XGdaluRnGZjMzJMzOZGpHnrfGM56+/fnGPVVVVVqqpVVWxCSxCTSAEMkZI3IyqXuqXyRuR/i7kinChISkCh+wA==" } }
When I try to restore it using Spring Data
or even MongoChef (both Java clients) as a file, I get the following error:
com.mongodb.BasicDBObject cannot be cast to [B
The collections were manually imported as they are without using MongoChef
or mongofiles
and I don't know where this error comes from.
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The GridFS spec expects a Binary
field data
in a collection chunks
. However, yours outputFs.chunks
does not meet these criteria.
The field data
here is not a Binary
BSON datatype , but is a regular document that has two fields named $type
and $data
.
mongoimport
will create a binary field only for JSON records in the following format. Note that the order of the fields matters for mongoimport
.
{
"$binary" : ...
"$type" : ...
}
Your example has fields $type
and $binary
.
Update your JSON file and import again outputFs.chunks
. mongoimport
will create valid binary fields and you can work with GridFS using other MongoDB tools.
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