Aerospike: zlib/bz2 store and retrieve didnt worked - aerospike

Question

I am compressing a string using zlib, then storing in Aerospike bin. On retrieval and decompressing, I am getting "zlib.error: Error -5 while decompressing data: incomplete or truncated stream"
When I compared original compressed data and retrieved compressed data, some thing is missing at the end in retrieved data.
I am using Aerospike 3.7.3 & python client 2.0.1
Please help
Thanks
Update: Tried using bz2. Throws ValueError: couldn't find end of stream while retrieve and decompress. Looks like aerospike is stripping of the last byte or something else from the blob.
Update: Posting the code
import aerospike
import bz2
config = {
'hosts': [
( '127.0.0.1', 3000 )
],
'policies': {
'timeout': 1000 # milliseconds
}
}
client = aerospike.client(config)
client.connect()
content = "An Aerospike Query"
content_bz2 = bz2.compress(content)
key = ('benchmark', 'myset', 55)
#client.put(key, {'bin0':content_bz2})
(key, meta, bins) = client.get(key)
print bz2.decompress(bins['bin0'])
Getting Following Error:
Traceback (most recent call last):
File "asread.py", line 22, in <module>
print bz2.decompress(bins['bin0'])
ValueError: couldn't find end of stream

Answer 1

The bz.compress method returns a string, and the client sees that type and tries to convert it to the server's as_str type. If it runs into a \0 in an unexpected position it will truncate the string, causing your error.
Instead, make sure to cast binary data to a bytearray, which the client converts to the server's as_bytes type. On the read operation, bz.decompress will work with the bytearray data and give you back the original string.
from __future__ import print_function
import aerospike
import bz2
config = {'hosts': [( '33.33.33.91', 3000 )]}
client = aerospike.client(config)
client.connect()
content = "An Aerospike Query"
content_bz2 = bytearray(bz2.compress(content))
key = ('test', 'bytesss', 1)
client.put(key, {'bin0':content_bz2})
(key, meta, bins) = client.get(key)
print(type(bins['bin0']))
bin0 = bz2.decompress(bins['bin0'])
print(type(bin0))
print(bin0)
Gives back
<type 'bytearray'>
<type 'str'>
An Aerospike Query