RPC.stopProxy can throw unintended exception while logging error
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Key: HADOOP-7695
URL: https://issues.apache.org/jira/browse/HADOOP-7695
Project: Hadoop Common
Issue Type: Bug
Components: ipc
Affects Versions: 0.24.0
Reporter: Aaron T. Myers
Assignee: Aaron T. Myers
Fix For: 0.24.0
{{RPC.stopProxy}} includes the following lines in case of error:
{code}
LOG.error("Could not get invocation handler " + invocationHandler +
" for proxy " + proxy + ", or invocation handler is not closeable.");
{code}
Trouble is, the {{proxy}} object is usually backed by {{WritableRpcEngine}},
which will fail in the event {{toString}} is called on one of its proxy
objects. See HADOOP-7694 for more details on that issue. Until that's
addressed, we might as well change the log message in {{RPC.stopProxy}} to not
call {{toString()}} on {{proxy}}.
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