Santhosh Sheshasayanan created HTTPCLIENT-1918:
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Summary: CLOSE_WAIT issue in HttpClint
Key: HTTPCLIENT-1918
URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1918
Project: HttpComponents HttpClient
Issue Type: Bug
Components: HttpClient (async)
Affects Versions: 4.5.5
Reporter: Santhosh Sheshasayanan
We are facing CLOSE_WAIT issue in our production system on heavy load. We are
using Apache's httpClient 4.5.5 and httpcore 4.4.9 in our code. Sometime the
server sends half of the data; sometime server sends no data and close the
connection at their end. Now, httpclient puts the socket connection to
CLOSE_WAIT indefinitely.
We tried the following but nothing helped us.
* Set TTL to 1 minutes in PoolingHttpClientConnectionManager
* Used the following methods
** evictExpiredConnections()
** evictIdleConnections(5, TimeUnit._SECONDS_)
**
[https://hc.apache.org/httpcomponents-client-ga/tutorial/html/connmgmt.html|https://apac01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhc.apache.org%2Fhttpcomponents-client-ga%2Ftutorial%2Fhtml%2Fconnmgmt.html&data=02%7C01%7Ckumaran.ae%40hcl.com%7Ce88009e18e4145e27ebc08d5aa2ae38c%7C189de737c93a4f5a8b686f4ca9941912%7C0%7C0%7C636602023532727032&sdata=2s0L63M%2F%2F7slLF3Uhx2Ly2SHSiknz0hA4fF8wDvxbS0%3D&reserved=0]
*** Topic "2.5. Connection eviction policy"
*** Topic "2.6. Connection keep alive strategy"
Later, we found the method "setValidateAfterInactivity". Its description
says "This check helps detect connections that have become stale (half-closed)
while kept inactive in the pool". So we thought it will help us to detect and
close the socket which are in "CLOSE_WAIT" state. But it did not help us.
Problem here, The HTTP client puts the socket into "CLOSE_WAIT" state and
waiting for the signal from server to close the socket. But the server closed
the connection already. Please suggest us how to handle/resolve the issue?
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