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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.getConnection
(BasicHttpClientConnectionManager.java:251)
at
org.apache.http.impl.conn.BasicHttpClientConnectionManager$1.get(BasicHt
tpClientConnectionManager.java:202)
at
org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.jav
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(InternalHttpCli
ent.java:185)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpCli
ent.java:83)
at
org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpCli
ent.java:56)
at
org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrC
lient.java:542)
at
org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.
java:255)
at
org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.
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
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