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https://issues.apache.org/jira/browse/HAWQ-1627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16518816#comment-16518816
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Hongxu Ma commented on HAWQ-1627:
---------------------------------
User can set this value in _etc/hdfs-client.xml_:
{code}
<property>
<name>ipc.maximum.data.length</name>
<value>134217728</value>
</property>
{code}
Default value is: 67108864(64M)
> Support setting the max protocol message size when talking with HDFS
> --------------------------------------------------------------------
>
> Key: HAWQ-1627
> URL: https://issues.apache.org/jira/browse/HAWQ-1627
> Project: Apache HAWQ
> Issue Type: Improvement
> Components: libhdfs
> Reporter: Hongxu Ma
> Assignee: Hongxu Ma
> Priority: Major
> Fix For: 2.4.0.0-incubating
>
>
> Now, the max size of protocol message in libhdfs is 64MB, and it cannot be
> adjusted.
> When the max size is reached (accessing a very big HDFS table/file), will see
> the following lines in hawq master log:
> {code}
> 2018-06-20 11:21:56.768003
> CST,,,p75703,th-848100416,,,,0,,,seg-10000,,,,,"LOG","00000","3rd party error
> log:
> [libprotobuf ERROR google/protobuf/io/coded_stream.cc:208] A protocol message
> was rejected because it was too big (more than 67108864 bytes). To increase
> the limit (or to
> disable these warnings), see CodedInputStream::SetTotalBytesLimit() in
> google/protobuf/io/coded_stream.h.",,,,,,,,"SysLoggerMain","syslogger.c",518,
> 2018-06-20 11:21:56.771657
> CST,,,p75703,th-848100416,,,,0,,,seg-10000,,,,,"LOG","00000","3rd party error
> log:
> 2018-06-20 11:21:56.771492, p75751, th0x7fffcd7303c0, ERROR Failed to invoke
> RPC call ""getFsStats"" on server ""localhost:9000"":
> RpcChannel.cpp: 783: HdfsRpcException: RPC channel to ""localhost:9000"" got
> protocol mismatch: RPC channel cannot parse response header.
> @ Hdfs::Internal::RpcChannelImpl::readOneResponse(bool)
> @ Hdfs::Internal::RpcChannelImpl::checkOneResponse()
> @
> Hdfs::Internal::RpcChannelImpl::invokeInternal(std::__1::shared_ptr<Hdfs::Internal::RpcRemoteCall>)
> @
> Hdfs::Internal::RpcChannelImpl:",,,,,,,,"SysLoggerMain","syslogger.c",518,
> 2018-06-20 11:21:56.771711
> CST,,,p75703,th-848100416,,,,0,,,seg-10000,,,,,"LOG","00000","3rd party error
> log:
> :invoke(Hdfs::Internal::RpcCall const&)
> @ Hdfs::Internal::NamenodeImpl::invoke(Hdfs::Internal::RpcCall const&)
> @ Hdfs::Internal::NamenodeImpl::getFsStats()
> @ Hdfs::Internal::NamenodeProxy::getFsStats()
> @ Hdfs::Internal::FileSystemImpl::getFsStats()
> @ Hdfs::Internal::FileSystemImpl::connect()
> @ Hdfs::FileSystem::connect(char const*, char const*, char const*)
> @ Hdfs::FileSystem::connect(char const*)
> @ hdfsBuilderConnect
> @ gpfs_hdfs_connect
> @ HdfsConnect
> @ HdfsGetConnection
> @ HdfsGetFileBlockLocati",,,,,,,,"SysLoggerMain","syslogger.c",518,
> {code}
> Considering HDFS has a guc *"ipc.maximum.data.length"* to set it, HAWQ should
> also add a guc for it.
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