Exception: Error decoding message (Key cannot be null)

Question

Hi guys,
     Coherence 3.3.1/389
     .Net API 3.3.1.2
     I've wrote small invocation task, which collects the info about cluster members, stores it to HashMap and return it as result. This is the code:
     NamedCache cache = CacheFactory.getCache(sCacheName);
     CacheService service = cache.getCacheService();
     Cluster cluster = service.getCluster();
     HashMap res = new HashMap();
     Set members = cluster.getMemberSet();
     Iterator iter = members.iterator();
     while(iter.hasNext())
     Member member = (Member)iter.next();
     res.put((Object)member.getProcessName(), new Integer(member.getPort()));
     As you can see if member.getProcessName() returns null, then null is placed to HashMap.
     When the result was returned to the client, I've got this exception:
     2007-10-04 09:55:45.849 <Error> (thread=Tangosol.Net.Messaging.Impl.ConnectionManager+ConnectionManagerDaemon): Error decoding message
     System.ArgumentNullException: Key cannot be null.
     Parameter name: key
     at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)
     at System.Collections.Hashtable.set_Item(Object key, Object value)
     at Tangosol.IO.Pof.PofStreamReader.ReadAsObject(Int32 typeId) in c:\dev\release.net\coherence-net-v3.3\src\Coherence\IO\Pof\PofStreamReader.cs:line 3446
     at Tangosol.IO.Pof.PofStreamReader.ReadObject(Int32 index) in c:\dev\release.net\coherence-net-v3.3\src\Coherence\IO\Pof\PofStreamReader.cs:line 2284
     at Tangosol.Net.Messaging.Impl.Response.ReadExternal(IPofReader reader) in c:\dev\release.net\coherence-net-v3.3\src\Coherence\Net\Messaging\Impl\Response.cs:line 117
     at Tangosol.Net.Messaging.Impl.Codec.Decode(IChannel channel, DataReader reader) in c:\dev\release.net\coherence-net-v3.3\src\Coherence\Net\Messaging\Impl\Codec.cs:line 118
     at Tangosol.Net.Messaging.Impl.Connection.DecodeMessage(DataReader reader) in c:\dev\release.net\coherence-net-v3.3\src\Coherence\Net\Messaging\Impl\Connection.cs:line 874
     I understood why it was happened, but I did not understood why it was masked and my client application was frozen until request time accured (180s).
     Why did you mask it?
     Regards,
     Dmitry.

Answer 1

Hi
Thanks for answered.
I tried to import just 6 lines but the same error.
Did you know, what could be?
I am pasting the log.
TOTAL STEPS  2
1. Convert Data:         completed  in 1 sec.
2. Load and Process:     Failed  in 1 sec.
3. Import:               completed  in 1 sec.
[Selection]
FILE=\GrupoPit\FRATECO\DataManager\DataFiles
41010100001.csv
TRANSFORMATION=\GrupoPit\FRATECO\DataManager\TransformationFiles
Frateco.xls
CLEARDATA= Yes
RUNLOGIC= Yes
CHECKLCK= No
[Messages]
Convert Data
Success
Record Count : 6
Accept Count : 6
Reject Count : 0
Skip Count   : 0
Key cannot be null.
Parameter name: key