How to push metrics to Zabbix with Java？

[王斐]

I tried to write a Reporter to push JVM matrics to Zabbix trapper.

but I found that I can only send 2047byte data...

When I tried to send 2048byte,the Zabbix Server only give me a string "OK"

It makes me confused

[Coda Hale]

This sounds like a problem with Zabbix.

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Coda Hale
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[Ryan Rupp]

Guessing you used the Java sample code snippet that's posted in the Zabbix documentation (https://www.zabbix.org/wiki/Docs/protocols/zabbix_sender/1.8/java_example)? The bit shifting done there fails after 2048 bytes, I can't remember why exactly and unfortunately don't have the code change offhand but basically the protocol is expecting ZBXD1<length_of_data_as_unsigned_int_in_little_endian> - so I think to resolve this I took the data length and converted it to an unsigned int then swapped the byte order from big endian to little endian (Zabbix forums may have a more elegant way to do this in Java).