Dominik Derwiński created HTTPCLIENT-2125:
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Summary: NullPointerException in BasicHttpClientConnectionManager
Key: HTTPCLIENT-2125
URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2125
Project: HttpComponents HttpClient
Issue Type: Bug
Components: HttpClient (classic)
Affects Versions: 5.0.3
Reporter: Dominik Derwiński
After switching to HttpClient 5 I get a NPE in a code that was previously
working. It's a pretty simple line
{noformat}
try (CloseableHttpResponse response = httpclient.execute(get, context)) {
{noformat}
which causes this:
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Caused by: java.lang.NullPointerException
at
org.apache.hc.client5.http.impl.io.BasicHttpClientConnectionManager.release(BasicHttpClientConnectionManager.java:278)
at
org.apache.hc.client5.http.impl.classic.InternalExecRuntime.discardEndpoint(InternalExecRuntime.java:245)
at
org.apache.hc.client5.http.impl.classic.InternalExecRuntime.releaseEndpoint(InternalExecRuntime.java:259)
at
org.apache.hc.client5.http.impl.classic.MainClientExec.execute(MainClientExec.java:136)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at
org.apache.hc.client5.http.impl.classic.ConnectExec.execute(ConnectExec.java:181)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at
org.apache.hc.client5.http.impl.classic.ProtocolExec.execute(ProtocolExec.java:172)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at
org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec.execute(HttpRequestRetryExec.java:93)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at
org.apache.hc.client5.http.impl.classic.ContentCompressionExec.execute(ContentCompressionExec.java:128)
at
org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at
org.apache.hc.client5.http.impl.classic.InternalHttpClient.doExecute(InternalHttpClient.java:178)
at
org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:75)
{noformat}
The request itself seems to be working, the problem is closing connection (I'm
using a NoConnectionReuseStrategy which mimics the old Strategy available in
version 4). This is in the log before crash:
{noformat}
[2020-11-02 16:35:53.389]
[org.apache.hc.client5.http.impl.io.DefaultManagedHttpClientConnection] [main]
[DEBUG] [org.apache.hc.client5.http.impl.io.DefaultManagedHttpClientConnection]
[close] [143] : http-outgoing-0: close connection IMMEDIATE
[2020-11-02 16:35:53.390]
[org.apache.hc.client5.http.impl.classic.InternalHttpClient] [main] [DEBUG]
[org.apache.hc.client5.http.impl.classic.InternalExecRuntime] [discardEndpoint]
[239] : InternalConnectionEndpoint-5175d9ad: endpoint closed
[2020-11-02 16:35:53.390]
[org.apache.hc.client5.http.impl.classic.InternalHttpClient] [main] [DEBUG]
[org.apache.hc.client5.http.impl.classic.InternalExecRuntime] [discardEndpoint]
[243] : InternalConnectionEndpoint-5175d9ad: discarding endpoint
[2020-11-02 16:35:53.390]
[org.apache.hc.client5.http.impl.io.BasicHttpClientConnectionManager] [main]
[DEBUG] [org.apache.hc.client5.http.impl.io.BasicHttpClientConnectionManager]
[closeConnection] [209] : Closing connection GRACEFUL
{noformat}
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