Re: A ClassNotFoundException was thrown while trying to deserialize cached value

[Anthony Baker]

Can you share at the full stack trace?  Thanks!  What version is this?

Anthony


On Oct 30, 2020, at 7:01 AM, Claudiu Balciza 
<cbalc...@1wa.org<mailto:cbalc...@1wa.org>> wrote:

By exporting data I mean the gfsh command

export data --region=myregion --file=geode-storage/myregion.gfd --member= 
server1

that’s useful for backups

perhaps I should give PDX a try since it is enabled by default in spring boot 
for geode

but I would still like to know why the data exporting doesn’t work with my 
current approach.

Claudiu Balcîza

From: Rupert St John Webster 
<rupert.stjohnwebs...@impress-solutions.com<mailto:rupert.stjohnwebs...@impress-solutions.com>>
Sent: Friday, October 30, 2020 02:25
To: user@geode.apache.org<mailto:user@geode.apache.org>
Subject: RE: A ClassNotFoundException was thrown while trying to deserialize 
cached value

Hi, what do you mean by export the data… do you mean “get” ?
I “get” domain arrays within arrays using a custom FromData method like this:

        public MyObject FromPdx(IPdxInstance pdx)
        {
            MyString = (string) pdx.GetField("MyType");
            MyChar = Convert.ToChar(pdx.GetField("MyChar"));
            MyInt = Convert.ToInt32(pdx.GetField("MyInt"));
            MyArray = FromPdxToMyArray(size, pdx.GetField("MyArray"));
            return this;
        }

        public IMyArray[] FromPdxToMyArray(int size, object o)
        {
            IList<object> objList = (List<object>)o;
            MyArray[] elements = new MyArray[size];
            int c = 0;

            foreach (object o2 in objList)
            {
                elements[c] = new MyArray().FromPdx((IPdxInstance)o2);
                c++;
            }
            return elements;
        }

Then in the MyArray().FromPdx(IPdxInstance) there’s a repeat of the MyObject 
FromPdx(pdx) method to get the array elements. If there were further arrays 
within arrays then the FromPdx() stack like this. It works for me.

Cheers.



From: Claudiu Balciza [mailto:cbalc...@1wa.org]
Sent: 29 October 2020 16:44
To: user@geode.apache.org<mailto:user@geode.apache.org>
Subject: A ClassNotFoundException was thrown while trying to deserialize cached 
value

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Hi,

I have this springboot application where I store and retrieve complex objects 
in geode (…array lists within array lists…).
I serialize the objects with DataSerializable and DataSerializer and use 
compression (the default snappy compressor).
It all works fine.

But when I try to export the data I get: java.io.IOException: 
org.apache.geode.cache.execute.FunctionException: 
org.apache.geode.SerializationException: A ClassNotFoundException was thrown 
while trying to deserialize cached value.

I packed all the domain classes in a jar and deployed the jar on the cluster 
(all classes have the toData and fromData methods)

I still get the exception above.

What am I doing wrong?

Claudiu Balciza