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https://issues.apache.org/jira/browse/KYLIN-3891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16795641#comment-16795641
]
zhao jintao commented on KYLIN-3891:
------------------------------------
I search this exception use google,and I find that the httpclient of jdbc need
retry when face NoHttpResponseException.
[apache
stack|https://stackoverflow.com/questions/10570672/get-nohttpresponseexception-for-load-testing/10680629#10680629]
After I add retry configuation in KylinClient.java of httpClient, It work fine
in my jdbc test.
httpClient.setHttpRequestRetryHandler((exception, executionCount, context) -> {
if (executionCount > 3) {
logger.warn("Maximum tries reached for client http pool ");
return false;
}
if (exception instanceof NoHttpResponseException
//NoHttpResponseException 重试
// || exception instanceof ConnectTimeoutException //连接超时重试
// || exception instanceof SocketTimeoutException
//响应超时不重试，避免造成业务数据不一致
) {
logger.warn("NoHttpResponseException on " + executionCount + "
call");
return true;
}
return false;
});
I use this jdbc client in FineReort system, jdbc client connect SLB,SLB connect
kylin.But I find that if I restart kylin, sometimes jdbc client response 502
httpcode from SLB。
I use this jdbc client in FineReort system, jdbc client connect SLB,SLB connect
kylin.But I find that if I restart kylin, sometimes jdbc client accept 502
response from SLB。
This is FineReport log:
at org.apache.kylin.jdbc.KylinConnection.<init>(KylinConnection.java:69)
at
org.apache.kylin.jdbc.KylinJdbcFactory.newConnection(KylinJdbcFactory.java:77)
at
org.apache.kylin.jdbc.shaded.org.apache.calcite.avatica.UnregisteredDriver.connect(UnregisteredDriver.java:138)
at
com.fr.third.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1461)
at
com.fr.third.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1525)
at
com.fr.third.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2099)
Caused by: java.io.IOException: POST failed, error code 502 and response:
<!DOCTYPE html>^M
Does any one meet this same problem?
> Kylin jdbc throws NoHttpResponseException
> -----------------------------------------
>
> Key: KYLIN-3891
> URL: https://issues.apache.org/jira/browse/KYLIN-3891
> Project: Kylin
> Issue Type: Bug
> Components: Driver - JDBC
> Affects Versions: v2.5.2
> Environment: Huawei FusionInsight
> Reporter: zhao jintao
> Priority: Major
> Labels: easyfix
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> Hi Team;
> When I use kylin jdbc, I find that jdbc throws NoHttpResponseException.
> Then I do jdbc test cases in "DriverTest.java", I use one jdbc connection
> query 20 times, each time first wait 20 minutes. Unfortunately， I also find
> that jdbc also throws NoHttpResponseException.
> This is my test code:
> try {
> for (int j = 0; j < 20; j++) {
> Thread.sleep(1000*20);
> Statement state = conn.createStatement();
> ResultSet resultSet = state.executeQuery("select count(*)
> from KYLIN_SALES ;");
> printResultSetMetaData(resultSet);
> printResultSet(resultSet);
> resultSet.close();
> }
> } catch (InterruptedException e){
> e.printStackTrace();
> }
> This is NoHttpResponseException:
> java.sql.SQLException: Error while executing SQL "select count(*) from
> KYLIN_SALES ;": java.sql.SQLException:
> org.apache.http.NoHttpResponseException: The target server failed to respond
> at org.apache.calcite.avatica.Helper.createException(Helper.java:56)
> at org.apache.calcite.avatica.Helper.createException(Helper.java:41)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:156)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:218)
> at org.apache.kylin.jdbc.DriverTest.testHttpClient(DriverTest.java:299)
> 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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
> at
> com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
> Caused by: java.lang.RuntimeException: java.sql.SQLException:
> org.apache.http.NoHttpResponseException: The target server failed to respond
> at org.apache.kylin.jdbc.KylinMeta.prepareAndExecute(KylinMeta.java:115)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:638)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:149)
> ... 24 more
> Caused by: java.sql.SQLException: org.apache.http.NoHttpResponseException:
> The target server failed to respond
> at org.apache.kylin.jdbc.KylinResultSet.execute(KylinResultSet.java:71)
> at
> org.apache.calcite.avatica.AvaticaConnection$1.execute(AvaticaConnection.java:630)
> at org.apache.kylin.jdbc.KylinMeta.prepareAndExecute(KylinMeta.java:111)
> ... 26 more
> Caused by: org.apache.http.NoHttpResponseException: The target server failed
> to respond
> at
> org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:95)
> at
> org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:62)
> at
> org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:254)
> at
> org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:289)
> at
> org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:252)
> at
> org.apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:191)
> at
> org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:300)
> at
> org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:127)
> at
> org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:715)
> at
> org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:520)
> at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
> at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
> at
> org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
> at
> org.apache.kylin.jdbc.KylinClient.executeKylinQuery(KylinClient.java:407)
> at org.apache.kylin.jdbc.KylinClient.executeQuery(KylinClient.java:363)
> at org.apache.kylin.jdbc.KylinResultSet.execute(KylinResultSet.java:69)
> ... 28 more
> Process finished with exit code -1
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