Re: “Failed to communicate with Ignite cluster" error when using JDBC Thin driver

[dkarachentsev]

Hi,

It's hard to say why it happens. I'm not familiar with mybatis and actually
don't know if it shares jdbc connection between threads. It would be great
if you could provide some reproducible example that will help to debug the
issue.

Thanks!
-Dmitry



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Re: “Failed to communicate with Ignite cluster" error when using JDBC Thin driver

[gunman524]

We are using mybatis to manage connection, is that matters?

BTW, I check the code in JdbcThinTcpIo method sendRequest 
 
JdbcResponse sendRequest(JdbcRequest req) throws IOException {
int cap = guessCapacity(req);

BinaryWriterExImpl writer = new BinaryWriterExImpl(null, new
BinaryHeapOutputStream(cap), null, null);

req.writeBinary(writer);

send(writer.array());

BinaryReaderExImpl reader = new BinaryReaderExImpl(null, new
BinaryHeapInputStream(read()), null, null, false);

JdbcResponse res = new JdbcResponse();

res.readBinary(reader);

return res;
}

After send() execute,  run read() immediately. Is that might introduce
synchronized issue?  The msg not come back from server when read it from
client out? As in our test env, the insert action has big chance to success
after several times retry. 



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Re: “Failed to communicate with Ignite cluster" error when using JDBC Thin driver

[dkarachentsev]

Is there any case that you're using Connection in more than one thread? It's
not thread safe for now.

Thanks!
-Dmitry



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Re: “Failed to communicate with Ignite cluster" error when using JDBC Thin driver

[gunman524]

It could not be a version issue, the thin driver and cluster version are
exactly same.

It can happened on any query but can not be reproduce 100%, it only happened
"some times".

In Log, I found  "Caused by: java.io.IOException: Failed to read incoming
message (not enough 
data). "
  
Firstly I guess the passing parms does not match with what defined in SQL,
but it not the case after double check.

So, any idea about it?



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Re: “Failed to communicate with Ignite cluster" error when using JDBC Thin driver

[dkarachentsev]

Hi,

Is it possible that version of thin driver is different from version of
cluster nodes? Does it happen on concrete queries or it could be on any one?

Thanks!
-Dmitry



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