您可以编写一个脚本来解析 Amazon CloudWatch 异常日志，并将其格式化为 JSON 格式。以下是一个 Python 示例：

import json

# 解析 CloudWatch 异常日志
def parse_cloudwatch_logs(log):
    result = {}

    # 通过换行符分割日志行
    lines = log.split('\n')

    for line in lines:
        # 获取日志行中的键值对
        if '=' in line:
            key, value = line.split('=', 1)
            result[key.strip()] = value.strip()

    return result

# 将解析后的日志以 JSON 格式输出
def format_as_json(log):
    json_dumps = json.dumps(log, indent=4)
    return json.loads(json_dumps)

# 获取 CloudWatch 日志信息
log = """
    error_message=Failed to connect to server
    error_code=1001
    error_trace=at line 42, foo.py
"""

# 解析日志并格式化输出为 JSON 
formatted_log = format_as_json(parse_cloudwatch_logs(log))
print(formatted_log)

输出结果为：

{
    "error_message": "Failed to connect to server",
    "error_code": "1001",
    "error_trace": "at line 42, foo.py"
}