错误 2998：未处理的内部错误。空 - 阿帕奇猪

Question

我编写了一个猪代码，我想在其中匹配具有多个字符串的列。例如。

    A = FOREACH A1 GENERATE
    c1, c2, c3,

--i have substituted junk values--

case
when (  (
       column_name matches '.*abc.*'
    OR column_name matches '.*sdf.*'
    OR column_name matches '.*bcd.*'
    OR column_name MATCHES '.*def.*'
    OR column_name MATCHES '.*efg.*'
    OR column_name MATCHES '.*ggg.*'
    OR column_name MATCHES '.*ghi.*'
    OR column_name MATCHES '.*hij.*'
    OR column_name MATCHES '.*ijk.*'
    OR column_name MATCHES '.*jkl.*'
    OR column_name MATCHES '.*klm.*'
    OR column_name MATCHES '.*lmn.*'
    or column_name matches '.*mno.*'
    or column_name matches '.*mnb.*'
    or column_name matches '.*opq.*'
    or column_name matches '.*pqr.*'
    or column_name matches '.*qrs.*'
    or column_name matches '.*stuv.*'
    or column_name matches '.*tuvw.*'
    or column_name matches '.*wxy.*'
    or column_name matches '.*tuvwx.*'
    or column_name matches '.*xyz.*'
    .
    .
    .
    .
    .
    ) then 1
            else 0 as c4;

观察到当OR column_name MATCHES '---'语句的数量超过672时，pig脚本运行失败，报错：

Pig Stack Trace
---------------
ERROR 2998: Unhandled internal error. null

java.lang.StackOverflowError
        at java.util.zip.Deflater.ensureOpen(Deflater.java:543)
        at java.util.zip.Deflater.deflate(Deflater.java:426)
        at java.util.zip.Deflater.deflate(Deflater.java:352)
        at java.util.zip.DeflaterOutputStream.deflate(DeflaterOutputStream.java:251)
        at java.util.zip.DeflaterOutputStream.write(DeflaterOutputStream.java:211)
        at java.io.ObjectOutputStream$BlockDataOutputStream.drain(ObjectOutputStream.java:1876)
        at java.io.ObjectOutputStream$BlockDataOutputStream.write(ObjectOutputStream.java:1840)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1533)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
        at java.util.ArrayList.writeObject(ArrayList.java:742)
        at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1495)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
        at java.util.ArrayList.writeObject(ArrayList.java:742)
        at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1495)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1547)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1508)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1431)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1177)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
        at java.util.ArrayList.writeObject(ArrayList.java:742)
        at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

请提出解决方案或替代方案以满足此要求。

Answer 1

您可能会考虑编写一个自定义过滤器函数1，以便更好地控制 RAM 消耗。您很可能不需要 RegEx，而是需要子字符串搜索。