[2021-07-03 18:58:31:765] [SEVERE  ] [           in_0-upload ] StanzaProcessor.processPacket()  : tigase.db.TigaseDBException: Could not allocate slot when processing from=sess-man@ip-172-31-0-99.us-west-2.compute.internal, to=null, DATA=<iq to="upload.tigase.im" from="…" id="F643BBC0-843F-4B1A-9062-FB00836D316D" xmlns="jabber:client" type="get"><request filename="F5551414-FEA7-46DE-A3A4-CA4A97A74E64.jpg" xmlns="urn:xmpp:http:upload:0" size="419901" content-type="image/jpeg"/></iq>, SIZE=284, XMLNS=jabber:client, PRIORITY=NORMAL, PERMISSION=AUTH, TYPE=get, STABLE_ID=null
java.lang.RuntimeException: tigase.db.TigaseDBException: Could not allocate slot
	at tigase.http.upload.logic.DefaultLogic.requestSlot(DefaultLogic.java:124)
	at tigase.http.upload.SlotRequestModule.process(SlotRequestModule.java:86)
	at tigase.component.modules.StanzaProcessor.execute(StanzaProcessor.java:214)
	at tigase.component.modules.StanzaProcessor.process(StanzaProcessor.java:201)
	at tigase.component.modules.StanzaProcessor.processPacket(StanzaProcessor.java:103)
	at tigase.component.AbstractKernelBasedComponent.processPacket(AbstractKernelBasedComponent.java:81)
	at tigase.server.AbstractMessageReceiver$QueueListener.run(AbstractMessageReceiver.java:1404)
Caused by: tigase.db.TigaseDBException: Could not allocate slot
	at tigase.http.upload.db.JDBCFileUploadRepository.allocateSlot(JDBCFileUploadRepository.java:115)
	at tigase.http.upload.db.FileUploadRepositoryPool.allocateSlot(FileUploadRepositoryPool.java:44)
	at tigase.http.upload.logic.DefaultLogic.requestSlot(DefaultLogic.java:121)
	... 6 more
Caused by: java.sql.SQLException: Incorrect string value: '\xF0\x9F\xA4\x98' for column '_res' at row 1
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
	at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:955)
	at com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:1005)
	at com.mysql.cj.jdbc.CallableStatement.executeQuery(CallableStatement.java:886)
	at jdk.internal.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at tigase.db.jdbc.PreparedStatementInvocationHandler.invoke(PreparedStatementInvocationHandler.java:38)
	at com.sun.proxy.$Proxy40.executeQuery(Unknown Source)
	at tigase.http.upload.db.JDBCFileUploadRepository.allocateSlot(JDBCFileUploadRepository.java:105)
	... 8 more