Pranav Saxena created HADOOP-18883:
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Summary: Expect-100 JDK bug resolution: prevent multiple server
calls
Key: HADOOP-18883
URL: https://issues.apache.org/jira/browse/HADOOP-18883
Project: Hadoop Common
Issue Type: Sub-task
Components: fs/azure
Reporter: Pranav Saxena
Assignee: Pranav Saxena
Fix For: 3.4.0
This is inline to JDK bug: [https://bugs.openjdk.org/browse/JDK-8314978].
With the current implementation of HttpURLConnection if server rejects the
“Expect 100-continue” then there will be ‘java.net.ProtocolException’ will be
thrown from 'expect100Continue()' method.
After the exception thrown, If we call any other method on the same instance
(ex getHeaderField(), or getHeaderFields()). They will internally call
getOuputStream() which invokes writeRequests(), which make the actual server
call.
In the AbfsHttpOperation, after sendRequest() we call processResponse() method
from AbfsRestOperation. Even if the conn.getOutputStream() fails due to
expect-100 error, we consume the exception and let the code go ahead. So, we
can have getHeaderField() / getHeaderFields() / getHeaderFieldLong() which will
be triggered after getOutputStream is failed. These invocation will lead to
server calls.
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