我不知道如何调试此问题，所以甚至不确定要提出哪些代码片段。以下是基本设置：
我必须从REST API中读取并写入SOAP API。据我所知，阅读和写作没有任何问题。我有3组读取，有3组匹配的写入可以并行发生，所以我使用FlowBuilder构建它们，如下所示：
final Flow firstFlow = new FlowBuilder<Flow>("firstFlow").from(Step1).end();
final Flow secondFlow = new FlowBuilder<Flow>("secondFlow").from(Step2).end();
final Flow thirdFlow = new FlowBuilder<Flow>("thirdFlow").from(Step3).end();
Flow mdmFlow = builder2.split(new SimpleAsyncTaskExecutor()).add(firstFlow, secondFlow, thirdFlow).build();
FlowBuilder<SimpleFlow> builder2 = new FlowBuilder<SimpleFlow>("attribsAndItemsFlow");
然后我像这样构建它：
return jobs.get("feedControlJob")
.incrementer(new RunIdIncrementer())
.listener(listener)
.preventRestart()
.start(mdmFlow)
.end()
.build();
在听众中我有：
public void beforeJob(JobExecution jobExecution) {
log.info("Starting Batch Job...");
}
将该行放在日志中，因此我知道正在正确加载侦听器。我也有：
@Override
public void afterJob(JobExecution jobExecution) {
log.info("Batch job finished, saving state.");
// some stuf to write files here
}
log.info永远不会运行所以我确信它没有到达那里。但是，我作家的最后一行是：
log.debug("Finished writes.");
这会写入所有三个流的日志。当我尝试使用调试器时，我很快就会在STS没有源代码的代码段中结束。
我能说的最好的是，在最后一个编写器退出结束和After Job事件之前的某个地方，出了点问题。我在控制台中没有出错。
我在日志级别设置为debug的情况下运行它，这是从我的最后一行代码开始的输出：
2016-08-30 16:46:37.046 DEBUG 11260 --- [cTaskExecutor-2] com.dcsg.writeobject.MdmItemWriterClass : Finished writes.
2016-08-30 16:46:37.046 DEBUG 11260 --- [cTaskExecutor-2] o.s.b.c.step.item.ChunkOrientedTasklet : Inputs not busy, ended: true
2016-08-30 16:46:37.046 DEBUG 11260 --- [cTaskExecutor-2] o.s.batch.core.step.tasklet.TaskletStep : Applying contribution: [StepContribution: read=20, written=20, filtered=0, readSkips=0, writeSkips=0, processSkips=0, exitStatus=EXECUTING]
2016-08-30 16:46:37.046 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Participating in existing transaction
2016-08-30 16:46:37.047 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL update
2016-08-30 16:46:37.047 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL statement [UPDATE BATCH_STEP_EXECUTION_CONTEXT SET SHORT_CONTEXT = ?, SERIALIZED_CONTEXT = ? WHERE STEP_EXECUTION_ID = ?]
2016-08-30 16:46:37.048 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : SQL update affected 1 rows
2016-08-30 16:46:37.049 DEBUG 11260 --- [cTaskExecutor-2] o.s.batch.core.step.tasklet.TaskletStep : Saving step execution before commit: StepExecution: id=0, version=1, name=GG Step, status=STARTED, exitStatus=EXECUTING, readCount=20, filterCount=0, writeCount=20 readSkipCount=0, writeSkipCount=0, processSkipCount=0, commitCount=1, rollbackCount=0, exitDescription=
2016-08-30 16:46:37.049 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Participating in existing transaction
2016-08-30 16:46:37.049 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL update
2016-08-30 16:46:37.049 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL statement [UPDATE BATCH_STEP_EXECUTION set START_TIME = ?, END_TIME = ?, STATUS = ?, COMMIT_COUNT = ?, READ_COUNT = ?, FILTER_COUNT = ?, WRITE_COUNT = ?, EXIT_CODE = ?, EXIT_MESSAGE = ?, VERSION = ?, READ_SKIP_COUNT = ?, PROCESS_SKIP_COUNT = ?, WRITE_SKIP_COUNT = ?, ROLLBACK_COUNT = ?, LAST_UPDATED = ? where STEP_EXECUTION_ID = ? and VERSION = ?]
2016-08-30 16:46:37.050 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : SQL update affected 1 rows
2016-08-30 16:46:37.050 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL query
2016-08-30 16:46:37.050 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL statement [SELECT VERSION FROM BATCH_JOB_EXECUTION WHERE JOB_EXECUTION_ID=?]
2016-08-30 16:46:37.051 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Initiating transaction commit
2016-08-30 16:46:37.051 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Committing JDBC transaction on Connection [org.hsqldb.jdbc.JDBCConnection@557528a5]
2016-08-30 16:46:37.051 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Releasing JDBC Connection [org.hsqldb.jdbc.JDBCConnection@557528a5] after transaction
2016-08-30 16:46:37.052 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.datasource.DataSourceUtils : Returning JDBC Connection to DataSource
2016-08-30 16:46:37.052 DEBUG 11260 --- [cTaskExecutor-2] o.s.batch.repeat.support.RepeatTemplate : Repeat is complete according to policy and result value.
2016-08-30 16:46:37.052 DEBUG 11260 --- [cTaskExecutor-2] o.s.batch.core.step.AbstractStep : Step execution success: id=0
2016-08-30 16:46:37.052 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Creating new transaction with name [org.springframework.batch.core.repository.support.SimpleJobRepository.updateExecutionContext]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT
2016-08-30 16:46:37.052 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.datasource.SimpleDriverDataSource : Creating new JDBC Driver Connection to [jdbc:hsqldb:mem:testdb]
2016-08-30 16:46:37.052 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Acquired Connection [org.hsqldb.jdbc.JDBCConnection@5e762da3] for JDBC transaction
2016-08-30 16:46:37.052 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Switching JDBC Connection [org.hsqldb.jdbc.JDBCConnection@5e762da3] to manual commit
2016-08-30 16:46:37.053 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL update
2016-08-30 16:46:37.053 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL statement [UPDATE BATCH_STEP_EXECUTION_CONTEXT SET SHORT_CONTEXT = ?, SERIALIZED_CONTEXT = ? WHERE STEP_EXECUTION_ID = ?]
2016-08-30 16:46:37.054 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : SQL update affected 1 rows
2016-08-30 16:46:37.054 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Initiating transaction commit
2016-08-30 16:46:37.054 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Committing JDBC transaction on Connection [org.hsqldb.jdbc.JDBCConnection@5e762da3]
2016-08-30 16:46:37.054 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Releasing JDBC Connection [org.hsqldb.jdbc.JDBCConnection@5e762da3] after transaction
2016-08-30 16:46:37.054 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.datasource.DataSourceUtils : Returning JDBC Connection to DataSource
2016-08-30 16:46:37.054 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Creating new transaction with name [org.springframework.batch.core.repository.support.SimpleJobRepository.update]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT
2016-08-30 16:46:37.054 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.datasource.SimpleDriverDataSource : Creating new JDBC Driver Connection to [jdbc:hsqldb:mem:testdb]
2016-08-30 16:46:37.054 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Acquired Connection [org.hsqldb.jdbc.JDBCConnection@5a915472] for JDBC transaction
2016-08-30 16:46:37.055 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Switching JDBC Connection [org.hsqldb.jdbc.JDBCConnection@5a915472] to manual commit
2016-08-30 16:46:37.055 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL update
2016-08-30 16:46:37.055 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL statement [UPDATE BATCH_STEP_EXECUTION set START_TIME = ?, END_TIME = ?, STATUS = ?, COMMIT_COUNT = ?, READ_COUNT = ?, FILTER_COUNT = ?, WRITE_COUNT = ?, EXIT_CODE = ?, EXIT_MESSAGE = ?, VERSION = ?, READ_SKIP_COUNT = ?, PROCESS_SKIP_COUNT = ?, WRITE_SKIP_COUNT = ?, ROLLBACK_COUNT = ?, LAST_UPDATED = ? where STEP_EXECUTION_ID = ? and VERSION = ?]
2016-08-30 16:46:37.056 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : SQL update affected 1 rows
2016-08-30 16:46:37.056 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL query
2016-08-30 16:46:37.056 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL statement [SELECT VERSION FROM BATCH_JOB_EXECUTION WHERE JOB_EXECUTION_ID=?]
2016-08-30 16:46:37.056 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Initiating transaction commit
2016-08-30 16:46:37.057 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Committing JDBC transaction on Connection [org.hsqldb.jdbc.JDBCConnection@5a915472]
2016-08-30 16:46:37.057 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Releasing JDBC Connection [org.hsqldb.jdbc.JDBCConnection@5a915472] after transaction
2016-08-30 16:46:37.057 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.datasource.DataSourceUtils : Returning JDBC Connection to DataSource
2016-08-30 16:46:37.057 DEBUG 11260 --- [cTaskExecutor-2] o.s.batch.core.step.AbstractStep : Step execution complete: StepExecution: id=0, version=3, name=GG Step, status=COMPLETED, exitStatus=COMPLETED, readCount=20, filterCount=0, writeCount=20 readSkipCount=0, writeSkipCount=0, processSkipCount=0, commitCount=1, rollbackCount=0
2016-08-30 16:46:37.057 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Creating new transaction with name [org.springframework.batch.core.repository.support.SimpleJobRepository.updateExecutionContext]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT
2016-08-30 16:46:37.057 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.datasource.SimpleDriverDataSource : Creating new JDBC Driver Connection to [jdbc:hsqldb:mem:testdb]
2016-08-30 16:46:37.057 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Acquired Connection [org.hsqldb.jdbc.JDBCConnection@5802f2e9] for JDBC transaction
2016-08-30 16:46:37.057 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Switching JDBC Connection [org.hsqldb.jdbc.JDBCConnection@5802f2e9] to manual commit
2016-08-30 16:46:37.058 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL update
2016-08-30 16:46:37.058 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : Executing prepared SQL statement [UPDATE BATCH_JOB_EXECUTION_CONTEXT SET SHORT_CONTEXT = ?, SERIALIZED_CONTEXT = ? WHERE JOB_EXECUTION_ID = ?]
2016-08-30 16:46:37.058 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.core.JdbcTemplate : SQL update affected 1 rows
2016-08-30 16:46:37.059 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Initiating transaction commit
2016-08-30 16:46:37.059 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Committing JDBC transaction on Connection [org.hsqldb.jdbc.JDBCConnection@5802f2e9]
2016-08-30 16:46:37.059 DEBUG 11260 --- [cTaskExecutor-2] o.s.j.d.DataSourceTransactionManager : Releasing JDBC Connection [org.hsqldb.jdbc.JDBCConnection@5802f2e9] after transaction
2016-08-30 16:46:37.059 DEBUG 11260 --- [cTaskExecutor-2] o.s.jdbc.datasource.DataSourceUtils : Returning JDBC Connection to DataSource
2016-08-30 16:46:37.059 DEBUG 11260 --- [cTaskExecutor-2] o.s.b.core.job.flow.support.SimpleFlow : Completed state=thirdFlow.GG Step with status=COMPLETED
2016-08-30 16:46:37.059 DEBUG 11260 --- [cTaskExecutor-2] o.s.b.core.job.flow.support.SimpleFlow : Handling state=thirdFlow.COMPLETED
2016-08-30 16:46:37.059 DEBUG 11260 --- [cTaskExecutor-2] o.s.b.core.job.flow.support.SimpleFlow : Completed state=thirdFlow.COMPLETED with status=COMPLETED
之后，它会无限期地挂起。
编辑：请求了一个线程转储，所以这里有一个挂起的时间：
2016-09-01 13:42:00
Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.66-b18 mixed mode):
"SimpleAsyncTaskExecutor-1" #16 prio=5 os_prio=0 tid=0x00000000211c2000 nid=0x157c runnable [0x000000001eb0d000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at sun.security.ssl.InputRecord.readFully(Unknown Source)
at sun.security.ssl.InputRecord.read(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
- locked <0x00000006c1eba630> (a java.lang.Object)
at sun.security.ssl.SSLSocketImpl.readDataRecord(Unknown Source)
at sun.security.ssl.AppInputStream.read(Unknown Source)
- locked <0x00000006c1ebb978> (a sun.security.ssl.AppInputStream)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
- locked <0x00000006c1ebb950> (a java.io.BufferedInputStream)
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
- locked <0x00000006c1ef2178> (a sun.net.www.protocol.https.DelegateHttpsURLConnection)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
- locked <0x00000006c1ef2178> (a sun.net.www.protocol.https.DelegateHttpsURLConnection)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
at org.springframework.http.client.SimpleClientHttpResponse.getRawStatusCode(SimpleClientHttpResponse.java:48)
at org.springframework.http.client.AbstractClientHttpResponse.getStatusCode(AbstractClientHttpResponse.java:33)
at org.springframework.web.client.DefaultResponseErrorHandler.getHttpStatusCode(DefaultResponseErrorHandler.java:56)
at org.springframework.web.client.DefaultResponseErrorHandler.hasError(DefaultResponseErrorHandler.java:50)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:629)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:597)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:557)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:475)
at com.dcsg.mdm.MdmItemItemReaderClass.getResultSetId(MdmItemItemReaderClass.java:173)
at com.dcsg.mdm.MdmItemItemReaderClass.init(MdmItemItemReaderClass.java:84)
at com.dcsg.mdm.MdmItemItemReaderClass.read(MdmItemItemReaderClass.java:107)
at com.dcsg.mdm.MdmItemItemReaderClass.read(MdmItemItemReaderClass.java:1)
at org.springframework.batch.core.step.item.SimpleChunkProvider.doRead(SimpleChunkProvider.java:91)
at org.springframework.batch.core.step.item.SimpleChunkProvider.read(SimpleChunkProvider.java:157)
at org.springframework.batch.core.step.item.SimpleChunkProvider$1.doInIteration(SimpleChunkProvider.java:116)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:374)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
at org.springframework.batch.core.step.item.SimpleChunkProvider.provide(SimpleChunkProvider.java:110)
at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:69)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:406)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:330)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:271)
at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:81)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:374)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:257)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:200)
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148)
at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64)
at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:67)
at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:169)
at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:144)
at org.springframework.batch.core.job.flow.support.state.SplitState$1.call(SplitState.java:93)
at org.springframework.batch.core.job.flow.support.state.SplitState$1.call(SplitState.java:90)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"RMI TCP Accept-0" #13 daemon prio=5 os_prio=0 tid=0x000000001e36f800 nid=0xbf8 runnable [0x000000001f8df000]
java.lang.Thread.State: RUNNABLE
at java.net.DualStackPlainSocketImpl.accept0(Native Method)
at java.net.DualStackPlainSocketImpl.socketAccept(Unknown Source)
at java.net.AbstractPlainSocketImpl.accept(Unknown Source)
at java.net.PlainSocketImpl.accept(Unknown Source)
- locked <0x00000006c0046480> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(Unknown Source)
at java.net.ServerSocket.accept(Unknown Source)
at sun.management.jmxremote.LocalRMIServerSocketFactory$1.accept(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"RMI TCP Accept-26293" #12 daemon prio=5 os_prio=0 tid=0x000000001e381000 nid=0x15e0 runnable [0x000000001f7ae000]
java.lang.Thread.State: RUNNABLE
at java.net.DualStackPlainSocketImpl.accept0(Native Method)
at java.net.DualStackPlainSocketImpl.socketAccept(Unknown Source)
at java.net.AbstractPlainSocketImpl.accept(Unknown Source)
at java.net.PlainSocketImpl.accept(Unknown Source)
- locked <0x00000006c00469e0> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(Unknown Source)
at java.net.ServerSocket.accept(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"RMI TCP Accept-0" #11 daemon prio=5 os_prio=0 tid=0x000000001e388800 nid=0x2ba4 runnable [0x000000001ed3e000]
java.lang.Thread.State: RUNNABLE
at java.net.DualStackPlainSocketImpl.accept0(Native Method)
at java.net.DualStackPlainSocketImpl.socketAccept(Unknown Source)
at java.net.AbstractPlainSocketImpl.accept(Unknown Source)
at java.net.PlainSocketImpl.accept(Unknown Source)
- locked <0x00000006c0046e70> (a java.net.SocksSocketImpl)
at java.net.ServerSocket.implAccept(Unknown Source)
at java.net.ServerSocket.accept(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
"Service Thread" #9 daemon prio=9 os_prio=0 tid=0x000000001e018000 nid=0x1e24 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"C1 CompilerThread2" #8 daemon prio=9 os_prio=2 tid=0x000000001df94800 nid=0x28b0 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"C2 CompilerThread1" #7 daemon prio=9 os_prio=2 tid=0x000000001df92800 nid=0x2150 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"C2 CompilerThread0" #6 daemon prio=9 os_prio=2 tid=0x000000001c89d000 nid=0x2d8c waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Attach Listener" #5 daemon prio=5 os_prio=2 tid=0x000000001c89b800 nid=0x2de4 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Signal Dispatcher" #4 daemon prio=9 os_prio=2 tid=0x000000001c898800 nid=0x2d18 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Finalizer" #3 daemon prio=8 os_prio=1 tid=0x000000001c834000 nid=0x2988 in Object.wait() [0x000000001da1f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000006c0089980> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(Unknown Source)
- locked <0x00000006c0089980> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(Unknown Source)
at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)
"Reference Handler" #2 daemon prio=10 os_prio=2 tid=0x000000001c832000 nid=0x2e58 in Object.wait() [0x000000001d90f000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000006c00899c0> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Unknown Source)
at java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)
- locked <0x00000006c00899c0> (a java.lang.ref.Reference$Lock)
"main" #1 prio=5 os_prio=0 tid=0x0000000002baa000 nid=0x2a64 waiting on condition [0x0000000002f7d000]
java.lang.Thread.State: WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000006c1fc8ea0> (a java.util.concurrent.FutureTask)
at java.util.concurrent.locks.LockSupport.park(Unknown Source)
at java.util.concurrent.FutureTask.awaitDone(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at org.springframework.batch.core.job.flow.support.state.SplitState.handle(SplitState.java:113)
at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:169)
at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:144)
at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:134)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:306)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
at com.sun.proxy.$Proxy33.run(Unknown Source)
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.execute(JobLauncherCommandLineRunner.java:216)
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.executeLocalJobs(JobLauncherCommandLineRunner.java:233)
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.launchJobFromProperties(JobLauncherCommandLineRunner.java:125)
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.run(JobLauncherCommandLineRunner.java:119)
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:800)
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:784)
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:771)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174)
at com.dcsg.mdm.MdmAttributeControlApplication.main(MdmAttributeControlApplication.java:28)
"VM Thread" os_prio=2 tid=0x000000001c82c800 nid=0x2d14 runnable
"GC task thread#0 (ParallelGC)" os_prio=0 tid=0x0000000002bbe800 nid=0x2bd0 runnable
"GC task thread#1 (ParallelGC)" os_prio=0 tid=0x0000000002bc0000 nid=0x272c runnable
"GC task thread#2 (ParallelGC)" os_prio=0 tid=0x0000000002bc2000 nid=0x1ca8 runnable
"GC task thread#3 (ParallelGC)" os_prio=0 tid=0x0000000002bc5800 nid=0x2b3c runnable
"VM Periodic Task Thread" os_prio=2 tid=0x000000001e371000 nid=0x2a00 waiting on condition
JNI global references: 237
答案 0 :(得分：0)
事实证明，至少在某些情况下，RestTemplate.exchange（）可以进入永不返回的状态。发生这种情况时，ItemReader也永远不会返回，也不会报告任何错误。批处理过程结束，看到一个（或多个）ItemReader进程仍未完成，并无限期地等待该读取器返回。我甚至让它过夜，它永远不会放弃等待。
我通过在RestTemplate调用中添加一个时间来解决这个问题。要设置超时，您需要创建ClientHttpRequest，如下所示：
private ClientHttpRequestFactory getClientHttpRequestFactory() {
HttpComponentsClientHttpRequestFactory clientHttpRequestFactory = new HttpComponentsClientHttpRequestFactory();
clientHttpRequestFactory.setConnectTimeout(this.timeout);
return clientHttpRequestFactory;
}
然后当你创建RestTemplage时，你会这样做：
RestTemplate restTemplate = new RestTemplate(getClientHttpRequestFactory());
我曾假设RestTemplate有一些默认超时，但似乎并非如此。
由于Hansjoerg的上述建议，我终于能够追踪到这一点，以研究线程转储。