Hi John, We have created a public jira [1] to track this issue. We will work on finding a solution for this.
[1] - https://wso2.org/jira/browse/DS-1110 On Fri, Sep 18, 2015 at 6:16 PM, John Q <[email protected]> wrote: > Hello, > This is the error I get > > Nested Exception:- > > java.sql.SQLException: Error occurred while initializing the EXCEL > datasource > > > > at > org.wso2.carbon.dataservices.core.description.query.SQLQuery.processPreNormalQuery(SQLQuery.java:832) > > at > org.wso2.carbon.dataservices.core.description.query.SQLQuery.runPreQuery(SQLQuery.java:2301) > > at > org.wso2.carbon.dataservices.core.description.query.Query.execute(Query.java:275) > > at > org.wso2.carbon.dataservices.core.engine.CallQuery.executeElement(CallQuery.java:188) > > at > org.wso2.carbon.dataservices.core.engine.OutputElement.execute(OutputElement.java:89) > > at > org.wso2.carbon.dataservices.core.description.operation.Operation.execute(Operation.java:61) > > at > org.wso2.carbon.dataservices.core.engine.DataService.invoke(DataService.java:474) > > at > org.wso2.carbon.dataservices.core.engine.DSOMDataSource.execute(DSOMDataSource.java:96) > > ... 46 more > > Caused by: DS Fault Message: Error in opening DBMS connection. > > DS Code: UNKNOWN_ERROR > > Nested Exception:- > > java.sql.SQLException: Error occurred while initializing the EXCEL > datasource > > > at > org.wso2.carbon.dataservices.core.description.query.SQLQuery.createConnection(SQLQuery.java:752) > > at > org.wso2.carbon.dataservices.core.description.query.SQLQuery.processPreNormalQuery(SQLQuery.java:805) > > ... 53 more > > Caused by: java.sql.SQLException: Error occurred while initializing the > EXCEL datasource > > at > org.wso2.carbon.dataservices.sql.driver.TExcelConnection.createConnectionToExcelDocument(TExcelConnection.java:56) > > at > org.wso2.carbon.dataservices.sql.driver.TExcelConnection.<init>(TExcelConnection.java:36) > > at > org.wso2.carbon.dataservices.sql.driver.TConnectionFactory.createConnection(TConnectionFactory.java:32) > > at org.wso2.carbon.dataservices.sql.driver.TDriver.connect(TDriver.java:50) > > at > org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278) > > at > org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182) > > at > org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:701) > > at > org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:635) > > at > org.apache.tomcat.jdbc.pool.ConnectionPool.getConnection(ConnectionPool.java:188) > > at > org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:128) > > at > org.wso2.carbon.dataservices.core.description.config.SQLConfig.createConnection(SQLConfig.java:188) > > at > org.wso2.carbon.dataservices.core.description.query.SQLQuery.createConnection(SQLQuery.java:728) > > ... 54 more > > Caused by: java.io.IOException: Unable to read entire header; 0 bytes > read; expected 512 bytes > > at > org.apache.poi.poifs.storage.HeaderBlock.alertShortRead(HeaderBlock.java:226) > > at > org.apache.poi.poifs.storage.HeaderBlock.readFirst512(HeaderBlock.java:207) > > at org.apache.poi.poifs.storage.HeaderBlock.<init>(HeaderBlock.java:104) > > at > org.apache.poi.poifs.filesystem.POIFSFileSystem.<init>(POIFSFileSystem.java:138) > > at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:322) > > at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:303) > > at > org.wso2.carbon.dataservices.sql.driver.TExcelConnection.createConnectionToExcelDocument(TExcelConnection.java:51) > > ... 65 more > > > It happens when I try multiple threads to WRITE into the excel file, not > always but often, > > Thx > > On Fri, Sep 18, 2015 at 2:08 AM, Rajith Vitharana <[email protected]> > wrote: > >> Hi John, >> >> I have tried a load test with multiple threads to test this. But I was >> able to successfully access the excel file. Used DSS3.2.2 version with >> "*.xls" file format. Will you be able to share more details on the error >> (carbon log with stack trace you get when trying to access, you can find >> the log files in "<SERVER_HOME>/repository/logs" folder) >> >> Thanks, >> >> On Fri, Sep 18, 2015 at 5:39 AM, John Q <[email protected]> wrote: >> >>> Hello, I have a data service that insert data into an excel file, I am >>> using the excel datasource. The problem is that when two or more client >>> call the service at the same time, onlye one of them success, the other >>> fail and the dss throws an exception trying to get the datasource, work >>> with the file or something like that, I guess maybe the excel file cannot >>> be accessed while it is being accessed by other instance of the service. >>> I need to know how can I solve this issue... >>> >>> thanks and best regards, >>> John >>> >>> _______________________________________________ >>> Architecture mailing list >>> [email protected] >>> https://mail.wso2.org/cgi-bin/mailman/listinfo/architecture >>> >>> >> >> >> -- >> Rajith Vitharana >> >> Software Engineer, >> WSO2 Inc. : wso2.com >> Mobile : +94715883223 >> Blog : http://lankavitharana.blogspot.com/ >> > > -- Rajith Vitharana Software Engineer, WSO2 Inc. : wso2.com Mobile : +94715883223 Blog : http://lankavitharana.blogspot.com/
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