hi all
sorry to post a not-dev problem here. because I can't find any
active forum(few people use oracle's Networking now).
I am using http client 4.3. I use PoolingHttpClientConnectionManager
with many threads.
but I found one thread hangs on socketRead0(other thread is correct)
netstat -anotp|grep 5872
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 192.168.11.181:35251 192.168.11.169:61616
ESTABLISHED 5872/java off (0.00/0/0)
tcp 0 0 192.168.11.181:35252 192.168.11.169:61616
ESTABLISHED 5872/java off (0.00/0/0)
tcp 0 0 49.4.132.244:56035 221.204.231.139:80
ESTABLISHED 5872/java off (0.00/0/0)
tcp 0 0 192.168.11.181:41935 192.168.11.151:2181
ESTABLISHED 5872/java off (0.00/0/0)
java stack:
"Thread-51" prio=10 tid=0x00007f7dfc20d800 nid=0x1846 runnable
[0x00007f7d5c5c4000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:152)
at java.net.SocketInputStream.read(SocketInputStream.java:122)
at
org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:136)
at
org.apache.http.impl.io.SessionInputBufferImpl.read(SessionInputBufferImpl.java:195)
at
org.apache.http.impl.io.ContentLengthInputStream.read(ContentLengthInputStream.java:178)
at
org.apache.http.impl.io.ContentLengthInputStream.read(ContentLengthInputStream.java:200)
at
org.apache.http.impl.io.ContentLengthInputStream.close(ContentLengthInputStream.java:103)
at
org.apache.http.impl.execchain.ResponseEntityWrapper.streamClosed(ResponseEntityWrapper.java:120)
at
org.apache.http.conn.EofSensorInputStream.checkClose(EofSensorInputStream.java:227)
at
org.apache.http.conn.EofSensorInputStream.close(EofSensorInputStream.java:174)
at org.apache.http.util.EntityUtils.consume(EntityUtils.java:88)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:222)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:160)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:136)
at
com.founder.httpclientfetcher.HttpClientFetcher.httpGet(HttpClientFetcher.java:464)
I have asked this question in httpclient mailing list and get this answer:
Assuming that this.getReadTimeout() returns a positive value, the read
operation can still block indefinitely if the server keeps on sending
packets often enough to prevent the operation from exceeding the socket
timeout value.
And I also goolged a stackover question:
http://stackoverflow.com/questions/15874834/httpclient-hangs-on-socketread0-with-successfully-executed-method
I have all the timeouts setup just fine but I found out we have on url
that does http chunking but sends no results(works fine in chrome, but
in http client it hangs forever even with the timeout set). Luckily I
own the server and just return some garbage and it no longer hangs.
This seems like a very unique bug in that http client does not handle
some kind of empty chunking case well(though I could be way off)....I
just know it hangs every time on that same url with empty data and
that url is http chunking csv download back to our http client.
is this reason causing my thread hang?
any solution for this?
