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All,
On 9/18/18 11:10, Christopher Schultz wrote:
> All,
>
> Our single-instance Solr server is just getting its first taste of
> production load, and I'm seeing this periodically:
>
> java.lang.IllegalStateException: Connection is still allocated
>
> The stack trace shows it's coming from HTTP Client as called from
> within Solr.
>
> We are using SolrJ 7.2.1 and Solr (server) 7.4.0.
>
> Our code looks something like this:
>
> private HashMap<String,HttpSolrClient> CLIENT_REGISTRY = new
> HashMap<String,HttpSolrClient>();
>
> synchronized HttpSolrClient getSolrClient(String url) throws
> ServiceException, SolrServerException, IOException,
> GeneralSecurityException { HttpSolrClient solrClient =
> CLIENT_REGISTRY.get(url);
>
> if(null == solrClient) { log.info("Creating new HttpSolrClient
> connected to " + url);
>
> solrClient = new HttpSolrClient.Builder(url)
> .withHttpClient(getHttpClient()) .build();
>
> solrClient.ping();
>
> CLIENT_REGISTRY.put(url, solrClient); }
>
> return solrClient; }
>
>
> [here's the code that uses the above]
>
> SolrClient solr = getSolrRegistry().getSolrClient(url);
>
> SolrInputDocument doc = new SolrInputDocument();
>
> // Add stuff to the document
>
> solr.add(doc); solr.commit();
>
> That's it.
>
> Other than not really needing the "commit" at the end, is there
> anything wrong with how we are using SolrJ client? Are instances
> of SolrJClient not thread-safe? My assumption was that they were
> threadsafe and that HTTP Client would manage the connection pool
> under the covers.
>
> Here is the full stack trace:
>
> com.chadis.api.business.RegistrationProcessor- Error processing
> registration request java.lang.IllegalStateException: Connection is
> still allocated at
> org.apache.http.util.Asserts.check(Asserts.java:34) at
> org.apache.http.impl.conn.BasicHttpClientConnectionManager.getConnecti
on
>
>
(BasicHttpClientConnectionManager.java:251)
> at
> org.apache.http.impl.conn.BasicHttpClientConnectionManager$1.get(Basic
Ht
>
>
tpClientConnectionManager.java:202)
> at
> org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.j
av
>
>
a:191)
> at
> org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:
18
>
>
5)
> at
> org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
>
>
at
> org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:
11
>
>
1)
> at
> org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpC
li
>
>
ent.java:185)
> at
> org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpC
li
>
>
ent.java:83)
> at
> org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpC
li
>
>
ent.java:56)
> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSol
rC
>
>
lient.java:542)
> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClien
t.
>
>
java:255)
> at
> org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClien
t.
>
>
java:244)
> at
> org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:194)
>
>
at
> org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:173)
> at
> org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:138)
> at
> org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:152) at
> [my code, calling SolrClient.add()]
>
> Any ideas?
>
> Thanks, -chris
>
For those interested, it looks like I was naïvely using
BasicHttpClientConnectionManager, which is totally inappropriate in a
multi-user threaded environment.
I switched to PooledHttpClientConnectionManager and that seems to be
working much better, now. :)
- -chris
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