[jira] [Created] (STORM-743) Invalid JSON produced when serializing TaskInfo and DataPoint types

["Erik Toth (JIRA)" <ji...@apache.org>]

Erik Toth created STORM-743:
-------------------------------

             Summary: Invalid JSON produced when serializing TaskInfo and DataPoint types
                 Key: STORM-743
                 URL: https://issues.apache.org/jira/browse/STORM-743
             Project: Apache Storm
          Issue Type: Bug
    Affects Versions: 0.9.3
            Reporter: Erik Toth
            Priority: Minor


In experimenting with a pure Node.js topology I attempted to write a simple logging consumer Bolt by merely observing the `__metrics` streams from my other existing components.

In doing so I observed that the message sent to my tasks is not valid json. For example:
```
{
    "comp": "changes",
    "tuple": [backtype.storm.metric.api.IMetricsConsumer$TaskInfo@28b63f13,[[__emit-count = {}],[__process-latency = {}],[__receive = {read_pos=0, write_pos=1, capacity=1024, population=1}],[__ack-count = {}],[__transfer-count = {}],[__execute-latency = {}],[__fail-count = {}],[__sendqueue = {read_pos=-1, write_pos=-1, capacity=1024, population=0}],[__execute-count = {}]]],
    "task":4,
    "stream":"__metrics",
    "id":"1702055549821416448"
}
```

This seems to be able to be tracked directly to bad JSON serialization of TaskInfo and the collection of Datapoint [1].

(Thanks!)

[1] https://github.com/nathanmarz/storm/blob/cdb116e942666973bc4eaa0df098d5bab82739e7/storm-core/src/jvm/backtype/storm/metric/api/IMetricsConsumer.java



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