ERROR org.dspace.discovery.SolrServiceImpl @ Error while initializing solr server

[Hoang Tran]

dear all, my dspace is normal running, i don't know why don't accessed.  Looking through the dspace  logs I see the following:  

2022-05-06 00:02:10,753 ERROR org.dspace.discovery.SolrServiceImpl @ Error while initializing solr server
org.apache.solr.client.solrj.SolrServerException: IOException occured when talking to server at: http://localhost:80/solr/search
    at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:566)
    at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:210)
    at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:206)
    at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:91)
    at org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:301)
    at org.dspace.discovery.SolrServiceImpl.getSolr(SolrServiceImpl.java:162)
    at org.dspace.discovery.SolrServiceImpl.cleanIndex(SolrServiceImpl.java:466)
    at org.dspace.discovery.IndexClient.main(IndexClient.java:153)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.dspace.app.launcher.ScriptLauncher.runOneCommand(ScriptLauncher.java:229)
    at org.dspace.app.launcher.ScriptLauncher.main(ScriptLauncher.java:81)
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:210)
    at java.net.SocketInputStream.read(SocketInputStream.java:141)
    at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:160)
    at org.apache.http.impl.io.SocketInputBuffer.fillBuffer(SocketInputBuffer.java:84)
    at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:273)
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:140)
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57)
    at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:261)
    at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:283)
    at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:251)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:197)
    at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:272)
    at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:124)
    at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:685)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:487)
    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:882)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
    at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:448)
    ... 13 more
2022-05-06 00:02:14,062 ERROR org.dspace.xoai.app.XOAI @ IOException occured when talking to server at: http://localhost:80/solr/oai
org.dspace.xoai.solr.exceptions.DSpaceSolrIndexerException: IOException occured when talking to server at: http://localhost:80/solr/oai
    at org.dspace.xoai.app.XOAI.index(XOAI.java:170)
    at org.dspace.xoai.app.XOAI.main(XOAI.java:393)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.dspace.app.launcher.ScriptLauncher.runOneCommand(ScriptLauncher.java:229)
    at org.dspace.app.launcher.ScriptLauncher.main(ScriptLauncher.java:81)
Caused by: org.dspace.xoai.solr.exceptions.DSpaceSolrException: IOException occured when talking to server at: http://localhost:80/solr/oai
    at org.dspace.xoai.solr.DSpaceSolrSearch.query(DSpaceSolrSearch.java:38)
    at org.dspace.xoai.app.XOAI.index(XOAI.java:149)
    ... 7 more
Caused by: org.apache.solr.client.solrj.SolrServerException: IOException occured when talking to server at: http://localhost:80/solr/oai
    at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:566)
    at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:210)
    at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:206)
    at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:91)
    at org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:301)
    at org.dspace.xoai.solr.DSpaceSolrSearch.query(DSpaceSolrSearch.java:33)
    ... 8 more
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:210)
    at java.net.SocketInputStream.read(SocketInputStream.java:141)
    at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:160)
    at org.apache.http.impl.io.SocketInputBuffer.fillBuffer(SocketInputBuffer.java:84)
    at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:273)
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:140)
    at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57)
    at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:261)
    at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:283)
    at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:251)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:197)
    at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:272)
    at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:124)
    at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:685)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:487)
    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:882)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
    at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:448)
    ... 13 more

I don't know how to fix it. Can you help me. Thanks