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https://issues.apache.org/jira/browse/PLC4X-159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988819#comment-16988819
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Christofer Dutz commented on PLC4X-159:
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Would it be possilbe to do a wireshark dump of the communication when doing
this write operation?.
It could be that we are expecting a response and the device isn't doing that
... I would like to make sure how to address this issue ASAP
> modbus: Future which writes data correctly in modbus does not return
> --------------------------------------------------------------------
>
> Key: PLC4X-159
> URL: https://issues.apache.org/jira/browse/PLC4X-159
> Project: Apache PLC4X
> Issue Type: Bug
> Components: Driver-Modbus
> Reporter: Alvaro del Castillo
> Priority: Major
>
> When writing data registers in modbus, the data is written correctly but the
> Future which does it does not return. The hack is just to not wait for the
> Future because you don't need the results. Just that the data is written. But
> if there are some error during the writing you don't know it. And probably
> the resources are not freed correctly.
> Some sample code:
> {code:java}
> PlcWriteRequest writeRequest = connection.writeRequestBuilder()
> .addItem(registerName, "register:" + offset + "[" + size + "]",
> writeRegister)
> .build();
> writeRequest.execute().whenComplete((writeResponse, error) -> {
> assertNotNull(writeResponse);
> });
> {code}
> The whenComplete is never called. I have follow the code and the "decode"
> method is called, so it is when processing the response from the modbus slave
> where the problem is.
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