Question

我正在使用Hypertable :: ThriftClient，并使用mutator进行大量插入。以下是代码示例：$ master，$ port和$ namespace都已定义。

Table:

show create table users; # Table schema is below

CREATE TABLE GROUP_COMMIT_INTERVAL "100" users (
    'column_name_fake' MAX_VERSIONS 1,
    ACCESS GROUP audience ('column_name_fake'),
)

:hypertable$ SELECT * FROM users limit 1; # displays
2342345 sf_following:1000234
2342346 sf_following:1234234

代码：

my $ht = new Hypertable::ThriftClient($master, $port);
my $ns = $ht->namespace_open($namespace);
my $users_mutator = $ht->mutator_open($ns, 'table_name', 2);

子程序：

sub batch_insert {                                                                       
    my ($ht, $mutator, $column_family, $row, $val) = @_;

    my $keys;                                                                            
    my $cell;                                                                            
    try {                                                                                
        $keys = new Hypertable::ThriftGen::Key({
            row           => $row, 
            column_family => $column_family });

        $cell = new Hypertable::ThriftGen::Cell({key => $keys, value => $val});          
    }                                                                                    
    catch {                                                                              
        warn Dumper({ 'Error' => $_ });                                                  
    };                                                                                    
    $ht->mutator_set_cell($mutator, $cell);                                              
    $ht->mutator_flush($mutator);                                                        
    return 1;                                                                            
}

函数调用：

for(.....) {    # Just for example
    batch_insert($ht, $users_mutator, '', $fs, "node:$node_u");
}

这里我得到一个例外，

 Hypertable::ThriftGen::ClientException=HASH(0x54d7380)

任何人都可以澄清，为什么？

编辑：为了更清晰，我添加了表格结构？

Answer 1

ClientException类定义如下：

异常ClientException { 1：i32代码 2：字符串消息 }

尝试捕获异常并打印出代码（十六进制）和消息。这应该有助于查明正在发生的事情。

Answer 2

FIX: So, this exception is raised is a required parameter 'column_qualifier' was not
     passed as per the table design. See below:

sub batch_insert {
    my ($ht, $mutator, $cf, $cq, $row, $val) = @_;
    my $keys = new Hypertable::ThriftGen::Key({
        row              => $row, 
        column_family    => $cf, 
        column_qualifier => $cq });

    my $cell = new Hypertable::ThriftGen::Cell({key => $keys, value => $val});
    $ht->mutator_set_cell($mutator, $cell);
    #$ht->mutator_flush($mutator);
}

Calling the above function:
--------------------------
batch_insert($ht, $users_mutator, 'column_family' , 'column_qualifier, 'row_key',  '');

它就像一个魅力。如果你遇到类似的问题，请告诉我，我可以提供帮助。我花了很多时间阅读Thrift api。

Perl Hypertable mutator异常

2 个答案: